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# Objective - Alpha blending can easily fail in many situations and requires sorting on the cpu ## Solution - Implement order independent transparency (OIT) as an alternative to alpha blending - The implementation uses 2 passes - The first pass records all the fragments colors and position to a buffer that is the size of N layers * the render target resolution. - The second pass sorts the fragments, blends them and draws them to the screen. It also currently does manual depth testing because early-z fails in too many cases in the first pass. ## Testing - We've been using this implementation at foresight in production for many months now and we haven't had any issues related to OIT. --- ## Showcase   ## Future work - Add an example showing how to use OIT for a custom material - Next step would be to implement a per-pixel linked list to reduce memory use - I'd also like to investigate using a BinnedRenderPhase instead of a SortedRenderPhase. If it works, it would make the transparent pass significantly faster. --------- Co-authored-by: Kristoffer Søholm <k.soeholm@gmail.com> Co-authored-by: JMS55 <47158642+JMS55@users.noreply.github.com> Co-authored-by: Charlotte McElwain <charlotte.c.mcelwain@gmail.com> |
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| .. | ||
| clustered_forward.wgsl | ||
| fog.rs | ||
| fog.wgsl | ||
| forward_io.wgsl | ||
| gpu_preprocess.rs | ||
| light.rs | ||
| mesh.rs | ||
| mesh.wgsl | ||
| mesh_bindings.rs | ||
| mesh_bindings.wgsl | ||
| mesh_functions.wgsl | ||
| mesh_preprocess.wgsl | ||
| mesh_types.wgsl | ||
| mesh_view_bindings.rs | ||
| mesh_view_bindings.wgsl | ||
| mesh_view_types.wgsl | ||
| mod.rs | ||
| morph.rs | ||
| morph.wgsl | ||
| parallax_mapping.wgsl | ||
| pbr.wgsl | ||
| pbr_ambient.wgsl | ||
| pbr_bindings.wgsl | ||
| pbr_fragment.wgsl | ||
| pbr_functions.wgsl | ||
| pbr_lighting.wgsl | ||
| pbr_prepass.wgsl | ||
| pbr_prepass_functions.wgsl | ||
| pbr_transmission.wgsl | ||
| pbr_types.wgsl | ||
| rgb9e5.wgsl | ||
| shadow_sampling.wgsl | ||
| shadows.wgsl | ||
| skin.rs | ||
| skinning.wgsl | ||
| utils.wgsl | ||
| view_transformations.wgsl | ||
| wireframe.wgsl | ||