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Code Issues 156 Wiki Activity

Vulkan ray tracing: shade the heightmap terrain from its layers; longer default SSR range

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Hirek
2026-10-25 17:15:58 +01:00
parent e201c83825
commit 71a6628a4a
10 changed files with 170 additions and 23 deletions
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docs/opengl46-renderer.md
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@@ -247,7 +247,7 @@ the environment map only.
| Entry | Default | Meaning |
|---|---|---|
| `gfx.ssr` | `medium` | `no`/`low`/`medium`/`high` (or 0..3): steps of the rays, 16, 32 or 64. `no`: the environment map only (the sky) |
| `gfx.ssr.range` | `250` | 10..2000: the longest ray, metres |
| `gfx.ssr.range` | `1000` | 10..2000: the longest ray, metres; what is farther from the reflecting surface reflects the sky |
| `gfx.ssr.roughness` | `0.6` | 0..1: the roughest surface (perceptual roughness) that reflects the scene |
| `gfx.raytracing yes/no` | `no` | Vulkan renderer only, on a graphics card with ray queries (`VK_KHR_ray_query`): what the screen space reflections don't find is traced through the scenery around the camera instead of reflecting the sky. Read at the start; with `gfx.ssr no` all the reflections of the scenery are traced |
| `gfx.raytracing.range` | `500` | 10..5000: the scenery within this distance from the camera takes part in the traced reflections, and the rays are this long, metres |
@@ -256,7 +256,9 @@ The traced reflections hold what the environment map held before, as `gfx.reflec
and the large shapes of the scenery (0), the tracks, the roads and the models within `gfx.reflections.range_instances` (1)
and the vehicles within `gfx.reflections.range_vehicles` (2, the default now), except the vehicle of the cab. `gfx.reflections.fidelity` and the
two ranges have no other use now; `gfx.reflections.framerate` still says how often the environment map (the sky) is
drawn. The point hit is lit by the sky, by the sun where nothing stands between them (a ray of its own) and by its own light; the lamps and headlights don't light it. Each part of a model gets its structure
drawn. The point hit has the colour of the diffuse texture of its material (the heightmap terrain: its layers blended by their
weights, without the normal and specular maps; the holes cut in it are not), and is lit by the sky, by the sun (its shadow map
where the map holds the point, a ray of its own elsewhere) and by its own light; the lamps and headlights don't light it. Each part of a model gets its structure
for the tracing the first time it's met (a few a frame, so a new place fills in over some frames), and loses it when it
isn't met for half a minute.