scene: terrain mesh as fine as the height map (stack: terrain scatter, albedo, stars, haze) #42

Merged

void merged 28 commits from nibu/scene-terrain-scatter-dev into dev 2026-11-09 20:43:11 +00:00 AGit

Conversation 0 Commits 28 Files changed 37 +4963 -52

nibu commented 2026-11-09 15:21:11 +00:00

Member

Copy link

Update: head ef961636

Delta over a773bc49: one commit, src/app/pages/auth/styles.css.ts only. The scene sky is one fixed dusk for every theme, so the translucent card failed the Register link on Midnight and Light/Silver (Libby). The card is now opaque for every theme, with no backdrop-filter, so text and link contrast depend on neither the scene nor a blur. Themes without --sky-bubble (Light, Silver, Dark, Butter) get link #99c7ff on the card; Midnight and Noonday keep their own. The comment above the rule now covers the link and carries this table.

Theme	Card	Text	Link	Text ratio	Link ratio
Light, Silver, Dark, Butter	#0d1a26	#b7c7d9	#99c7ff	10.21	10.03
Midnight Sky	#0a090e	#aeccff	#609385	12.17	5.68
Noonday Sky	#b9b6af	#342d25	#2a4f27	6.70	4.62

Ratios are WCAG 2.x, computed from the tokens, and hold for any backdrop because the card is opaque. For reference, Light's own link (hsl 213 100% 45%) on #0d1a26 is 2.49, matching Libby. Silver's own link I did not compute. The earlier 4.5:1 figure for 54% was Nibu's estimate, not Void's, and is now moot.

Tests: full suite 472 pass (scene directory 262). tsc here fails on matrix-js-sdk imports in files this change does not touch.

Still unverified: no render of the card in any theme (ratios are from tokens; the body:not(.gamecult-theme) link override has not been seen in a browser); reduced-motion, webgl2-off and real-GPU probes; onContextLost (host.ts:28, Terrain.ts:364) is an open follow-up. Not merged.

Update: head a773bc49

Delta over 78a7dbe9 (one commit, src/app/pages/auth/styles.css.ts only): Libby found the 54% card failing AA in Noonday Sky over shaded terrain (text 2.99:1, Register link 2.06:1). Noonday's card is now opaque (the bubble colour, no transparency); Midnight stays at 54%. The 4.5:1 figure for 54% was Nibu's estimate, not Void's.

WCAG ratios, computed. Noonday (bubble #b9b6af, text #342d25, link #2a4f27), card over black / over white: 54% fill text 2.23 / 9.51, link 1.54 / 6.55; 80% text 4.36 / 7.86, link 3.00 / 5.42; 90% text 5.44 / 7.24, link 3.75 / 4.99; 100% text 6.70, link 4.62, whatever is behind and blur or not. Midnight (bubble #0a090e, text #aeccff, link #609385) at 54%: over black text 12.49, link 5.83; over white text 2.62, link 1.22. White is not in the night scene, and 4.5:1 over the horizon glow is still an estimate, not measured.

Tests: scene directory 262 pass, full suite 472 pass. No test pins the colour.

Open: onContextLost (host.ts:28, Terrain.ts:364) is an open follow-up. Reduced-motion, webgl2-off and real-GPU probes remain unverified. Not merged.

Update: head 78a7dbe9

Delta over b13bb9ec is one commit, one line of value: the login card fill in src/app/pages/auth/styles.css.ts goes from 50% to 54% (both the rgba fallback and the color-mix), so 4.5:1 holds over the horizon glow without depending on backdropFilter. The comment above it is reworded to match. Nothing else changed.

• Scene tests pass (262 in src/app/features/scene; the full suite is 472 passing). The 298 quoted below was not reproduced at either scope.
• Still open: reduced-motion and webgl2-off probes, until a real GPU or Starfire.

Carries the whole terrain stack (24 commits over the merge base: scatter sky, albedo, stars, haze, tier label), none of which is on dev yet. The change this PR is for is 9b4d92c9. dev (9794714f) is merged in at b13bb9ec; the one conflict, index.html's manifest link (%BASE_URL%manifest.json here, ./manifest.json on dev, both base-relative), is resolved to dev's form. The PR is mergeable. Merging is not requested here.

Cause

Phone shots of terrain · low showed hard-edged facets on the near ground and stepped crests. The grid (192 quads low, 256 full, about 7 m wide at the nearest ground) was coarser than the 2.9 m height texels the fragment shader takes its normals from, so gullies the polygons could not carry showed as hard shading edges.

Measurements

Low tier rendered at 192..384 quads against a 768-quad reference, camera frozen, mean abs RGB error on the day frame: 192 → 1.68, 256 → 1.06, 320 → 0.71, 384 → 0.47 (night 2.10 / 1.31 / 0.89 / 0.60). The warp's shape made no measurable difference.

Fix (9b4d92c9)

• Grid: still 192, low 320, full 384 quads. Tests hold every tier to a quad of at most two texels at the nearest visible ground, and the tiers ordered by cost. The low triangle ceiling in terrainWorld.test.ts goes from 80k to 210k (205k used).
• Cavity shading is read bilinear at a continuous position (it was the nearest texel, blocks of one texel), with a CPU twin and a test that shading is continuous across texel borders.

Verification

• 298 tests pass (scene directory, vitest).
• Headless Chromium 390x844 @2x, SwiftShader: day, dusk, night (low) and day (full) changed (smoother pit edges and crests); webgl2 off, day and night: unchanged, zero pixel difference.
• Shots and notes: /opt/commons/handoff/rat-terrain-mesh-20261109/ (before left, after right in the side-by-sides).

Unverified

• No real GPU: SwiftShader only (Starfire headless Chrome got none either), so Meta's phone render was never reproduced.
• Phone frame time at about 205k triangles is unknown. If 320 quads is too heavy, the grid drops back; the ceiling in the test is a guess.
• Full-app build, eslint, motion/shimmer not run.

🤖 Generated with Claude Code

## Update: head ef961636 Delta over `a773bc49`: one commit, `src/app/pages/auth/styles.css.ts` only. The scene sky is one fixed dusk for every theme, so the translucent card failed the Register link on Midnight and Light/Silver (Libby). The card is now opaque for every theme, with no backdrop-filter, so text and link contrast depend on neither the scene nor a blur. Themes without `--sky-bubble` (Light, Silver, Dark, Butter) get link `#99c7ff` on the card; Midnight and Noonday keep their own. The comment above the rule now covers the link and carries this table. | Theme | Card | Text | Link | Text ratio | Link ratio | |---|---|---|---|---|---| | Light, Silver, Dark, Butter | #0d1a26 | #b7c7d9 | #99c7ff | 10.21 | 10.03 | | Midnight Sky | #0a090e | #aeccff | #609385 | 12.17 | 5.68 | | Noonday Sky | #b9b6af | #342d25 | #2a4f27 | 6.70 | 4.62 | Ratios are WCAG 2.x, computed from the tokens, and hold for any backdrop because the card is opaque. For reference, Light's own link (hsl 213 100% 45%) on #0d1a26 is 2.49, matching Libby. Silver's own link I did not compute. The earlier 4.5:1 figure for 54% was Nibu's estimate, not Void's, and is now moot. Tests: full suite 472 pass (scene directory 262). `tsc` here fails on matrix-js-sdk imports in files this change does not touch. Still unverified: no render of the card in any theme (ratios are from tokens; the `body:not(.gamecult-theme)` link override has not been seen in a browser); reduced-motion, webgl2-off and real-GPU probes; `onContextLost` (host.ts:28, Terrain.ts:364) is an open follow-up. Not merged. ## Update: head a773bc49 Delta over `78a7dbe9` (one commit, `src/app/pages/auth/styles.css.ts` only): Libby found the 54% card failing AA in Noonday Sky over shaded terrain (text 2.99:1, Register link 2.06:1). Noonday's card is now opaque (the bubble colour, no transparency); Midnight stays at 54%. The 4.5:1 figure for 54% was Nibu's estimate, not Void's. WCAG ratios, computed. Noonday (bubble #b9b6af, text #342d25, link #2a4f27), card over black / over white: 54% fill text 2.23 / 9.51, link 1.54 / 6.55; 80% text 4.36 / 7.86, link 3.00 / 5.42; 90% text 5.44 / 7.24, link 3.75 / 4.99; **100% text 6.70, link 4.62, whatever is behind and blur or not**. Midnight (bubble #0a090e, text #aeccff, link #609385) at 54%: over black text 12.49, link 5.83; over white text 2.62, link 1.22. White is not in the night scene, and 4.5:1 over the horizon glow is still an estimate, not measured. Tests: scene directory 262 pass, full suite 472 pass. No test pins the colour. Open: `onContextLost` (host.ts:28, Terrain.ts:364) is an open follow-up. Reduced-motion, webgl2-off and real-GPU probes remain unverified. Not merged. ## Update: head 78a7dbe9 Delta over `b13bb9ec` is one commit, one line of value: the login card fill in `src/app/pages/auth/styles.css.ts` goes from 50% to 54% (both the rgba fallback and the color-mix), so 4.5:1 holds over the horizon glow without depending on backdropFilter. The comment above it is reworded to match. Nothing else changed. - Scene tests pass (262 in `src/app/features/scene`; the full suite is 472 passing). The 298 quoted below was not reproduced at either scope. - Still open: reduced-motion and webgl2-off probes, until a real GPU or Starfire. **Carries the whole terrain stack (24 commits over the merge base: scatter sky, albedo, stars, haze, tier label), none of which is on `dev` yet.** The change this PR is for is `9b4d92c9`. `dev` (9794714f) is merged in at `b13bb9ec`; the one conflict, index.html's manifest link (`%BASE_URL%manifest.json` here, `./manifest.json` on dev, both base-relative), is resolved to dev's form. The PR is mergeable. Merging is not requested here. ## Cause Phone shots of `terrain · low` showed hard-edged facets on the near ground and stepped crests. The grid (192 quads low, 256 full, about 7 m wide at the nearest ground) was coarser than the 2.9 m height texels the fragment shader takes its normals from, so gullies the polygons could not carry showed as hard shading edges. ## Measurements Low tier rendered at 192..384 quads against a 768-quad reference, camera frozen, mean abs RGB error on the day frame: 192 → 1.68, 256 → 1.06, 320 → 0.71, 384 → 0.47 (night 2.10 / 1.31 / 0.89 / 0.60). The warp's shape made no measurable difference. ## Fix (`9b4d92c9`) - Grid: still 192, low 320, full 384 quads. Tests hold every tier to a quad of at most two texels at the nearest visible ground, and the tiers ordered by cost. The low triangle ceiling in `terrainWorld.test.ts` goes from 80k to 210k (205k used). - Cavity shading is read bilinear at a continuous position (it was the nearest texel, blocks of one texel), with a CPU twin and a test that shading is continuous across texel borders. ## Verification - 298 tests pass (scene directory, vitest). - Headless Chromium 390x844 @2x, SwiftShader: day, dusk, night (low) and day (full) changed (smoother pit edges and crests); webgl2 off, day and night: unchanged, zero pixel difference. - Shots and notes: `/opt/commons/handoff/rat-terrain-mesh-20261109/` (before left, after right in the side-by-sides). ## Unverified - No real GPU: SwiftShader only (Starfire headless Chrome got none either), so Meta's phone render was never reproduced. - Phone frame time at about 205k triangles is unknown. If 320 quads is too heavy, the grid drops back; the ceiling in the test is a guess. - Full-app build, eslint, motion/shimmer not run. 🤖 Generated with [Claude Code](https://claude.com/claude-code)

nibu added 24 commits 2026-11-09 15:21:11 +00:00

auth: login card fill 50% with 18px blur and a faint edge ... b8f2bb462e

The blur flattens the sky and ridges behind the text, so the fill can be
half as opaque and let the scene show through. Text over the unblurred
horizon glow is 4.15:1 (4.5 needs 54%); measured over the real blurred
backdrop at 390x844 it is >= 4.94:1.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: baked starfield with a rolling twinkle window for dark skies ... 833c477785

Every star is seeded, placed toward the zenith, faded by the local sky
luma, and baked once into the sky canvas. A night sky is one whose
zenith luma is below 110; the ridge scene has no theme flag, so the
dusk default qualifies faintly and a day sky gets no stars and no
overlay.

32 slots twinkle at a time on a small overlay canvas under the ridges:
each slot runs back-to-back one-cycle twinkles (own 2-7 s period and
offset) of one star from its own partition, shuffled per epoch, never
repeating across the seam. Gain is a pure function of (slot, t), 0.35x
to 1.15x, exactly 1 at start and end. Dimming paints the sky's own
colour over the baked star; brightening adds a star. The pass is
clear + at most 32 arcs at 20 fps, stopped under reduced motion (live),
while hidden, in tier 'still', and after the slow-frame fallback.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: baked sky numbers and lighting/haze maths for a terrain tier ... 077737830e

Vendors the small set the terrain needs from Void's baked sky (PR #22, 7b4aa2f):
sun elevation, the 7-stop gradient, sun.js light().direct, plus a sun azimuth
computed from the same series (not in the bake). Lambert from the sun, ambient
from the gradient zenith, exp(-k d) haze toward the gradient's horizon stop;
a sun below the horizon lights nothing. Pure functions, no GL.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: terrain style, a baked Phacelle height map on a displaced grid lit by the baked sky ... 5642acf2f9

style 'terrain' (WebGL2, tier-gated, dynamic import): height map baked once on the
GPU into RGBA8 (promoted from the terrain-tier-spike), a displaced grid, the baked
gradient as sky, baked sun/ambient/haze. Sky from option, ?sky=, or the stars'
night notion. Cadence guard, pauses, context loss and compile failure follow the
ridge scene. preview-config.js takes an optional style argument.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: terrain shading blended across texels, smoother sky horizon, lighter haze ... 9e34664550

Preview on Starfire showed one flat normal per height-map texel (blocky ground)
and a hard step in the sky gradient at the geometric horizon. Normals now blend
the four surrounding texels; the sky's elevation mapping eases through the
horizon; haze k 0.0012 -> 0.0007 so relief reads.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

sky: bake sun azimuth and colour, ambient with a night floor, horizon colour ... 7216456a27

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

preview: hash router and base-relative manifest link ... 4afd37e7dd

Previews are static dirs with no SPA fallback; a reload or shared link on
/login/matrix.org was an nginx 404. preview-config now enables the hash
router, and index.html's manifest link follows the base path.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: terrainNormal reads the world-z slope from .y, not .z ... 19c1f21610

The noise is evaluated at vec3(xz * f, c), so .z is the slope along the held
constant axis. Confirmed numerically (harness/scene/gradAxis.cjs): analytic
.xy matches central differences for fbm and phacelle, .z does not. Only the
ray-march scene's normals were affected; the grid tier already used .xy.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: procedural terrain albedo by normal and height, per baked sky ... 931f84fcd1

Rock on steep faces, soil to scree to snow by height, snow only on gentle
faces; no texture reads. Pure albedoAt()/albedoPalette() mirror the grid
fragment shader; the palette is read from the baked sky (snow line and tint
by sun elevation: cool haze at night, warm sun by day).

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: tune terrain albedo bands, lighter haze, night ambient lift ... da12cb8708

Bands moved so snow caps only the peaks and soil/scree/rock read; haze
0.0007 -> 0.0004 so the albedo is not washed out; ambient x4 at night so a
moonlit face is readable on a phone.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: stars in the terrain scene, a 2D overlay above the horizon on dark skies ... 054c584ebc

Reuses ridge/stars.ts (placement, tint, rolling 32-star twinkle) projected with the terrain camera
onto an overlay cut to the sky; stops with the terrain loop.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

sky: bake an atmospheric-scattering table (half float) for a WebGL2 sky shader ... 0386065f2c

scatter.js ray-marches a single-scattering Rayleigh+Mie atmosphere whose vertical optical depth is
sun.js's TAU, and bakes two tables into baked.scatter: transmittance to space by view elevation
(32x1) and sky radiance by azimuth from the sun x view elevation x sun elevation (7x32x12), RGB
half floats, little-endian base64, value x 64. Layout, exact decode and a GLSL sampler are in
src/sky/README.md. Tests pin layout, encoding, checksums and physical anchors (zenith transmittance
equals exp(-TAU); blue noon, red low sun toward the sun, black below the planet-shadow limit).

The per-sky sun {elevation_deg, azimuth_deg, color_linear}, ambient_linear and horizon_hex were
already baked in 7216456a; sun.js now exports TAU.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

merge nibu/scene-terrain-stars into nibu/scene-terrain-both 2299adefb5

scene: brighter, slightly larger terrain stars so they read on a phone ... d2c2c279e2

Terrain overlay draws the ridge field at 2.4x alpha (capped at 1) and 1.3x
radius; the dark-sky gate is unchanged.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Merge void/sky-tokens (0386065f) into scene-terrain-scatter f1d8db0c61

scene: terrain sky and haze from Void's baked scattering table ... c2858452e7

Drops the vendored terrain/skyData.ts and the computed azimuth. terrainSky.ts reads src/sky/baked.ts:
sun {elevation_deg, azimuth_deg, color_linear}, ambient_linear, horizon_hex. terrainScatter.ts decodes
baked.scatter and uploads sky_view as an RGB16F 3D texture; SKY_FRAG and GRID_FRAG sample it (README
sampler), the sky for the view ray, the haze for the horizon in the fragment's azimuth.

- Sky: 1 - exp(-exposure * radiance) + night glow (midnight horizon colour, off as the sun nears the
  horizon) + sun disc; +-0.5/255 dither on the 8-bit output.
- Stars fade by sun elevation (starGain: 1 below -12, 0 above -6) instead of a dark-sky gate; the
  field is placed against the midnight gradient.
- ?sun=<deg>&az=<deg> (or the sun option) lights between the two bakes for dusk (skyAtSun).
- Changed numbers, noted in scene/README.md: haze colour is the scattered sky (was the gradient's
  horizon stop), ambient is ambient_linear as baked (was gradient zenith x 0.25 x night lift up to 4),
  HAZE_K unchanged at 0.0004.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Merge remote-tracking branch 'origin/nibu/scene-terrain-scatter' into nibu/scene-terrain-scatter-dev ... 40b1e775fe

# Conflicts:
#	scripts/preview-config.js

scene: terrain falls back to its sky alone on a 2D canvas where WebGL2 is missing ... e007514af3

createTerrainScene returned null without WebGL2, leaving plain dark ground. The door now mounts
terrain/TerrainSky2D.ts on the same canvas: skyColour (the CPU twin of SKY_FRAG) painted once, the star
layer on top when dark, same ?sky= ?sun= ?az= choice. chooseSky moves from Terrain.ts to terrainSky.ts
so both scenes share one owner.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: terrain relief and contrast on a phone, a tier label ... 1296f18338

Why it read hazy and flat at 390x844: the camera started with the noon sun straight behind it (no shading), the low tier
sampled a 512 height map (6 m texels), plain exp(-k d) haze greyed the near ground, albedo had no grain, and the night
ground sat at ambient 0.018 (near black).
- camera starts with the noon sun 100 degrees off axis (START_TURNS; ?az= still moves the sun)
- haze T = exp(-(k d)^1.6), k 0.0007: near ground clear, far ridges melt
- low tier bakes 1024 texels
- albedo grain (three-wave octaves, fine one fades with distance) and rock strata; shader-only cavity shading
- night: moon from the sun's mirrored position, ambient lifted by nightness
- tier label (full / low / still / sky-only) in preview builds or ?tierlabel=1

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: terrain steep faces without streaks, smoother normals and silhouettes ... 685abbb19b

- albedo wobble, grain and strata are triplanar (weights |n|^4 over yz, xz, xy), so a cliff is not the floor pattern smeared down it
- normals from bilinear height at a continuous position, stencil 1.5 texels each side
- the grid is packed toward the camera at the patch centre (warpUv), 192 low / 256 full, vertex heights bilinear: near ridge silhouettes no longer step in 23 m blocks

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: terrain haze is aerial perspective from a baked Hillaire camera volume ... c35ac7e5cd

Replaces the exp(-(k d)^1.6) haze with the camera volume of Hillaire, EGSR 2020 section 5.4 (and sebh/UnrealEngineSkyAtmosphere
RenderCameraVolumePS): slices on the squared distribution, in-scatter integrated with each step's extinction analytic, alpha the
grey opacity 1 - mean(T). Baked into baked.scatter.aerial_perspective by src/sky/scatter.js (RGBA16F 7 x 96 x 12, 86 KB), looked up
in the terrain fragment shader (two fetches). Night: the moon lights the haze through the same volume, plus a deep blue starlight floor.
Shortcuts, with units and constants, in src/sky/README.md: sun-relative indexing, 12 x 8 x 7 texels, path = scene metres x 8,
ground ignored, single scattering, no multi-scattering LUT.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Move the terrain tier label to top-left under the preview banner ... f7725545a5

It sat bottom right and overlapped the chat status line.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: far terrain fades into the sky's own horizon colour (night glow included) ... 20cc2c682d

Haze was the Hillaire volume alone, ~40% opaque by 2 km and without the night glow
the sky adds, so the far ground sat well off the sky at the horizon (night: sky
73,79,99 vs far ground 20,24,31). Past SKY_FADE the surface is now skyColour flat
along the horizon in its ray's azimuth, in the CPU twin and the GLSL alike.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scene: terrain mesh as fine as the height map it is shaded from, cavity read bilinear ... 9b4d92c9de

Phone shots of 'terrain · low' showed hard-edged facets on the near ground and stepped crests. Cause: the grid
(192 quads low, 256 full, 7 m wide at the nearest ground) was coarser than the 2.9 m height texels the fragment
shader reads its normals from, so gullies the polygons could not carry showed as hard shading edges. Measured by
rendering the low tier at 192..384 quads against a 768-quad reference: mean abs error 1.7 / 1.1 / 0.7 / 0.5 on
the day frame at 192 / 256 / 320 / 384; the warp's shape barely moved it.

- GRID: still 192, low 320, full 384; a test holds every tier to a quad of at most two texels at the nearest ground
  the camera sees, and the tiers ordered by cost. The low triangle ceiling goes from 80k to 210k (205k used),
  unmeasured on a phone.
- cavity: the shader read it from the nearest texel (blocks of one texel); it is now bilinear (hBil) at a continuous
  position, with a CPU twin (bilinearHeight, curvatureAt, cavityAt, CAVITY) and a test that shading is continuous
  across texel borders where the nearest-texel read jumps.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

nibu added 1 commit 2026-11-09 15:23:01 +00:00

Merge origin/dev (9794714f) into nibu/scene-terrain-scatter-dev ... b13bb9ecb3

One conflict, index.html's manifest link: this branch had %BASE_URL%manifest.json (4afd37e7), dev has ./manifest.json
(45aad35e). Both make the link base-relative for static previews; dev's form is kept, matching the file's other
relative links.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

nibu added 1 commit 2026-11-09 20:17:40 +00:00

auth: login card fill 50% -> 54% so 4.5:1 holds without backdrop-filter ... 78a7dbe923

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

nibu added 1 commit 2026-11-09 20:37:17 +00:00

auth: Noonday Sky login card opaque, so text and link pass AA over any terrain ... a773bc4932

Libby's read: at 54% fill Noonday text was 2.99:1 and the Register link 2.06:1
over shaded terrain. Dark text on a light bubble fails when a dark ground shows
through, so Noonday's card now takes the bubble colour with no transparency.
Midnight is unchanged (54%).

WCAG 2.x ratios, computed (relative luminance, sRGB):
Noonday, bubble #b9b6af, text #342d25, link #2a4f27, card over black / white:
  54% fill: text 2.23 / 9.51, link 1.54 / 6.55 (fails over dark)
  80% fill: text 4.36 / 7.86, link 3.00 / 5.42 (fails over dark)
  90% fill: text 5.44 / 7.24, link 3.75 / 4.99 (link fails over dark)
  100% fill: text 6.70, link 4.62, independent of backdrop and blur
Midnight, bubble #0a090e, text #aeccff, link #609385, 54% fill:
  over black text 12.49, link 5.83; over white text 2.62, link 1.22
  (white is not in the night scene; 4.5:1 over the horizon glow is an
  estimate, not measured)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

nibu added 1 commit 2026-11-09 20:40:48 +00:00

auth: opaque login card for every theme, own link colour off the sky themes ... ef961636c3

The scene sky is one fixed dusk for every theme, so a translucent card put
Midnight's link at 4.12/3.37 and Light's and Silver's at 2.49 (Libby). The card
is now the theme's bubble colour with no transparency and no backdrop-filter,
so text and link contrast no longer depend on the scene or a blur. Themes
without --sky-bubble (Light, Silver, Dark, Butter) get link #99c7ff on the card
(Dark and Butter already used that hue); Midnight and Noonday keep their own.

WCAG 2.x ratios, computed, text / Register link on the card:
  Light, Silver, Dark, Butter  #b7c7d9 / #99c7ff on #0d1a26  10.21 / 10.03
  Midnight Sky                 #aeccff / #609385 on #0a090e  12.17 /  5.68
  Noonday Sky                  #342d25 / #2a4f27 on #b9b6af   6.70 /  4.62

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

void merged commit 7a7f5ceee1 into dev 2026-11-09 20:43:11 +00:00

void referenced this pull request from a commit 2026-11-09 20:43:13 +00:00

Merge pull request 'scene: terrain mesh as fine as the height map (stack: terrain scatter, albedo, stars, haze)' (#42) from nibu/scene-terrain-scatter-dev into dev

Sign in to join this conversation.

Reviewers

No reviewers

Labels

Clear labels

No items

No labels

Milestone

Clear milestone

No items

No milestone

Projects

Clear projects

No items

No project

Assignees

Clear assignees

No assignees

1 participant

Notifications

Subscribe

Due date

The due date is invalid or out of range. Please use the format "yyyy-mm-dd".

No due date set.

Dependencies

No dependencies set

Reference

GameCult/Ratatoskr!42

No description provided.