MikhailGorobets
commented
1 month ago Computing Irradiance Cube Map 640x640 per side with 8192 samples on GPU - AMD Radeon(TM) 610M:
- Hammersley Current Version: D3D12 - 7814.65 ms Vulkan - 13118.9 ms
- Hammersley Imrpoved: D3D12- 6423.19 ms Vulkan - 11336.2 ms
- Golden Ratio D3D12 - 6855.13 ms Vulkan - 11735.5 ms
- SSBO with Golden Ratio
D3D12 - 5902.45 ms Vulkan - 4291.33 ms
Something strange with the performance on Vulkan
IBL precomputation currently takes too much time on some low-end devices causes driver to crash. The shader needs to be optimized. One thing that should help is to precompute Hammersley2D sequence and store it in a constant buffer (use float4 for each element of the sequence).