front: exact depth-peeled front layer (alpha-over)
occlusion: optional depth-only stamp that writes depth where the surface's own
alpha clears oitOcclusionThreshold (used to occlude annotation labels). Off by
default; its program is only compiled by Three when the pass actually renders it.
The OIT render passes a material provides a variant for.
depthMin: min view-space linear depth pre-pass (front-layer detection)accum: single-buffer weighted-blended OIT tail (b-weighted, carries coverage)front: exact depth-peeled front layer (alpha-over)occlusion: optional depth-only stamp that writes depth where the surface's own alpha clearsoitOcclusionThreshold(used to occlude annotation labels). Off by default; its program is only compiled by Three when the pass actually renders it.