EEVEE-Next: Optimize GBuffer Layout and writting #115541

Merged
Clément Foucault merged 11 commits from fclem/blender:eevee-next-gbuffer-improvement into main 2023-12-01 14:41:24 +01:00

This layout is more flexible and polymorphic.

While the worst case is worse (4 + 3 layers),
the common case is more optimized (2 + 2 layers).
The average written closure data is also lower
since we can compact the data for special cases
which are quite frequent.

Some adjustment had to be made in the denoise an
tile classify shaders.

Results:

Lit Scene GBuffer Occupancy Before GBuffer Occupancy After

TODOs:

  • Split GBuffer between framebuffer attachment and imageStore.
  • Remove use of stencil buffer.
  • Use GPU_framebuffer_bind_ex for clearing.
  • Add debug visualization.
  • Add optimized GBuffer configurations. (Only dielectric configuration was added as packing other types is currently ineffective or not possible)

Follow-up:

  • Add tile based deferred lighting to replace the stencil based rejection.
This layout is more flexible and polymorphic. While the worst case is worse (4 + 3 layers), the common case is more optimized (2 + 2 layers). The average written closure data is also lower since we can compact the data for special cases which are quite frequent. Some adjustment had to be made in the denoise an tile classify shaders. ### Results: | Lit Scene | GBuffer Occupancy Before | GBuffer Occupancy After | | -------- | -------- | -------- | | ![](https://projects.blender.org/attachments/1669147c-14f0-4bb3-ad0a-0e00c63996f6) | ![](https://projects.blender.org/attachments/f43082d3-f48f-4796-9a41-6ec1593f88e4) | ![](https://projects.blender.org/attachments/392b9dce-3e33-4f30-b3bc-4afcc9a915bb) | ### TODOs: - [x] Split GBuffer between framebuffer attachment and imageStore. - [x] Remove use of stencil buffer. - [x] Use GPU_framebuffer_bind_ex for clearing. - [x] Add debug visualization. - [x] Add optimized GBuffer configurations. (Only dielectric configuration was added as packing other types is currently ineffective or not possible) ### Follow-up: - Add tile based deferred lighting to replace the stencil based rejection.
Clément Foucault added 1 commit 2023-11-28 20:48:37 +01:00
c60b8728f6 EEVEE-Next: Change GBuffer Layout
This layout is more flexible and polymorphic.

While the worst case is worse (4 + 3 layers),
the common case is more optimized (2 + 2 layers).
The average written closure data is also lower
since we can compact the data for special cases
which are quite frequent.

Some adjustment had to be made in the denoise an
tile classify shaders.
Clément Foucault changed title from EEVEE-Next: Change GBuffer Layout to EEVEE-Next: Optimize GBuffer Layout and writting 2023-11-28 20:48:57 +01:00
Clément Foucault added the
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EEVEE
label 2023-11-28 20:49:14 +01:00
Clément Foucault added this to the 4.1 milestone 2023-11-28 20:49:18 +01:00
Clément Foucault added this to the EEVEE & Viewport project 2023-11-28 20:49:25 +01:00
Clément Foucault added 1 commit 2023-11-29 19:37:08 +01:00
Clément Foucault force-pushed eevee-next-gbuffer-improvement from 0450c51c74 to 60c841b02d 2023-11-29 20:37:05 +01:00 Compare
Clément Foucault added 1 commit 2023-11-30 01:09:40 +01:00
Clément Foucault added 5 commits 2023-11-30 20:04:15 +01:00
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Clément Foucault added 1 commit 2023-12-01 14:37:51 +01:00
Clément Foucault merged commit fe848ce3ef into main 2023-12-01 14:41:24 +01:00
Clément Foucault deleted branch eevee-next-gbuffer-improvement 2023-12-01 14:41:25 +01:00
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Reference: blender/blender#115541
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