feat(renderer): cone-sampled cloud sun march (ADR-0040) #105

Merged

akadmin merged 1 commit from feat/cloud-cone-sampling into main

2026-07-10 04:06:07 +00:00

akadmin commented

2026-07-10 04:01:00 +00:00

Owner

Replace the ADR-0037 linear 6-step sun march with Horizon-style cone
sampling: 5 samples pushed off-axis by a fixed widening kernel over
600 m (smooth shadow gradients, neighboring-cloud occlusion) plus a
distant on-axis 6th sample at 3x the cone length for far-cloud shadows.
Light samples switch to a cheap density_at variant (skips curl + detail
erosion) once the view ray is >0.3 opaque. Shader-only; no push-constant
or Rust changes. Closes #28.

Co-Authored-By: Claude Fable 5 noreply@anthropic.com

Replace the ADR-0037 linear 6-step sun march with Horizon-style cone sampling: 5 samples pushed off-axis by a fixed widening kernel over 600 m (smooth shadow gradients, neighboring-cloud occlusion) plus a distant on-axis 6th sample at 3x the cone length for far-cloud shadows. Light samples switch to a cheap density_at variant (skips curl + detail erosion) once the view ray is >0.3 opaque. Shader-only; no push-constant or Rust changes. Closes #28. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

akadmin added 1 commit

2026-07-10 04:01:01 +00:00

feat(renderer): cone-sampled cloud sun march (ADR-0040)

CI / build (pull_request) Successful in 3m23s

Details

d2b25902cf

Replace the ADR-0037 linear 6-step sun march with Horizon-style cone
sampling: 5 samples pushed off-axis by a fixed widening kernel over
600 m (smooth shadow gradients, neighboring-cloud occlusion) plus a
distant on-axis 6th sample at 3x the cone length for far-cloud shadows.
Light samples switch to a cheap density_at variant (skips curl + detail
erosion) once the view ray is >0.3 opaque. Shader-only; no push-constant
or Rust changes. Closes #28.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>