Module ibl 

Image-based lighting (IBL) bake — the data-layer “environment → GPU” projection.

IblBaker runs once at startup (driven by the ibl_bake DataSystem) and produces the static GPU resources image-based lighting samples:

• an environment cubemap (a procedural sky for now, an authored HDR later),
• a diffuse irradiance cube (cosine-convolved environment),
• and — added in a later increment — a prefiltered specular cube + the split-sum BRDF LUT (both stand-ins for now).

Because the bake is one-time and needs render passes, it records into a standalone command encoder ([GraphicsDevice::create_command_encoder]) and submits it directly, outside the per-frame loop — no lane or agent required. The resulting [IblGpuBindings] is stored behind interior mutability (the baker is a shared resource) and consumed by the lit lanes at group 3 via IblBaker::bindings.

Structs

EnvironmentMap

Selects the scene’s environment source for the IBL bake.

IblBaker

One-time IBL bake service. Registered as a shared resource at bootstrap and driven by the ibl_bake DataSystem, which calls ensure_baked every frame; the bake itself runs only on the first call.