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[Muazzaz]

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[Copilot]

Pull request overview

This PR updates the scene’s daytime atmosphere and significantly reworks the orchard road visuals to better match a 2‑lane highway look (continuous asphalt surface, painted center/edge lines, updated roundabout), with a couple of related visual tweaks in the vehicle and terrain.

Changes:

• Adjusts daytime fog/hemisphere lighting parameters for a cooler, more muted look.
• Rebuilds OrchardRoads geometry/materials to a continuous 2‑lane road with center/edge striping and updated roundabout meshes.
• Tweaks vehicle visual alignment logic and updates some scene accent materials (and removes the decorative terrain start pad).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
src/lib/timeOfDay.ts	Updates daytime lighting/fog/hemisphere parameters.
src/components/scene/Vehicle.tsx	Adjusts visual chassis Y snap logic and changes a material’s color/emissive.
src/components/scene/Terrain.tsx	Removes the decorative start pad mesh.
src/components/scene/OrchardRoads.tsx	Reworks road/roundabout geometry generation and materials (2‑lane road + painted lines/curbs).

Comments suppressed due to low confidence (2)

src/components/scene/OrchardRoads.tsx:143

• Outer edge-line vertices use a single ely computed from getTerrainHeight(pt.x, pt.z), but the edge-line points are far from pt (near ±halfW). This can cause edge lines to intersect the asphalt on sloped terrain. Compute Y per edge-line vertex instead.

    const ely = getTerrainHeight(pt.x, pt.z) + roadElevation + 0.003;

src/components/scene/OrchardRoads.tsx:214

• roadVerts uses varying Y values to follow the terrain, but normals are hard-coded to (0,1,0). This makes lighting incorrect on sloped sections (specular/diffuse won't match the actual road surface). Compute vertex normals from the geometry.

  const roadGeo = new THREE.BufferGeometry();
  roadGeo.setAttribute('position', new THREE.Float32BufferAttribute(roadVerts, 3));
  roadGeo.setAttribute('normal', new THREE.Float32BufferAttribute(roadNorms, 3));
  roadGeo.setIndex(roadIndices);

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