EEVEE: Incorrect rendering when render size smaller than reflection probe size #117444

New Issue

Jeroen Bakker · 2024-01-23T12:56:10+01:00

Jeroen Bakker commented

2024-01-23 12:56:10 +01:00

System Information
Operating system: Linux-6.5.0-14-generic-x86_64-with-glibc2.35 64 Bits, X11 UI
Graphics card: AMD Radeon PRO W7500 (gfx1102, LLVM 16.0.6, DRM 3.54, 6.5.0-14-generic) AMD 4.6 (Core Profile) Mesa 23.2.0-devel

Blender Version
Broken: version: 4.1.0 Alpha, branch: main (modified), commit date: 2024-01-23 10:12, hash: cd756143cf7a
Worked: (newest version of Blender that worked as expected)

Short description of error
When rendering an image in EEVEE-Next, where the resolution of the image is smaller than the reflection probe size, the image will contain render artifacts.

Exact steps for others to reproduce the error

Set render engine to EEVEE-Next
Add sphere reflection probe
set render resolution to 256*256
set probe resolution to 512*512
render image.

The cause is that the HizBuffer is initialized based on the render extent, but a different size could be used when render probes are updated. It was assumed that the render extent was always bigger then the spherical probes.

I see similar artifacts on Metal and Vulkan. The actual artifacts can differ per scene.

I have created an issue as there are multiple ways how to handle this situation and we should first discuss the correct solution.

See the attached files for an example file, the correct and incorrect rendering and a renderdoc screenshot showing the incorrect hiz buffer.

**System Information** Operating system: Linux-6.5.0-14-generic-x86_64-with-glibc2.35 64 Bits, X11 UI Graphics card: AMD Radeon PRO W7500 (gfx1102, LLVM 16.0.6, DRM 3.54, 6.5.0-14-generic) AMD 4.6 (Core Profile) Mesa 23.2.0-devel **Blender Version** Broken: version: 4.1.0 Alpha, branch: main (modified), commit date: 2024-01-23 10:12, hash: `cd756143cf7a` Worked: (newest version of Blender that worked as expected) **Short description of error** When rendering an image in EEVEE-Next, where the resolution of the image is smaller than the reflection probe size, the image will contain render artifacts. **Exact steps for others to reproduce the error** * Set render engine to EEVEE-Next * Add sphere reflection probe * set render resolution to 256*256 * set probe resolution to 512*512 * render image. The cause is that the HizBuffer is initialized based on the render extent, but a different size could be used when render probes are updated. It was assumed that the render extent was always bigger then the spherical probes. I see similar artifacts on Metal and Vulkan. The actual artifacts can differ per scene. I have created an issue as there are multiple ways how to handle this situation and we should first discuss the correct solution. See the attached files for an example file, the correct and incorrect rendering and a renderdoc screenshot showing the incorrect hiz buffer.

glossy_ggx.blend

647 KiB

correct.png

47 KiB

image.png

441 KiB

incorrect.png

17 KiB