EEVEE Next: lighting breaks / background darkens when using "Transparent Shadows" #115371

New Issue

RedMser · 2023-11-24T18:32:03+01:00

RedMser commented

2023-11-24 18:32:03 +01:00

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 546.01

Blender Version
Broken: version: 4.1.0 Alpha, branch: main, commit date: 2023-11-24 00:19, hash: 23430f4db868

Short description of error
When adding a mesh or hair into a fully empty scene, the background gets visibly darker.

Exact steps for others to reproduce the error

Load factory settings
Enable render preview in 3dview (so that EEVEE legacy is used)
Remove all objects
Switch to EEVEE Next
Add mesh -> plane, observe
Add curves -> fur, observe (even empty hair causes the problem!!)

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 546.01 **Blender Version** Broken: version: 4.1.0 Alpha, branch: main, commit date: 2023-11-24 00:19, hash: `23430f4db868` **Short description of error** When adding a mesh or hair into a fully empty scene, the background gets visibly darker. **Exact steps for others to reproduce the error** - Load factory settings - Enable render preview in 3dview (so that EEVEE legacy is used) - Remove all objects - Switch to EEVEE Next - Add mesh -> plane, observe - Add curves -> fur, observe (even empty hair causes the problem!!)

23-11-24_18-30-06_blender_Bass_clip.mp4

3.8 MiB

RedMser added the

labels 2023-11-24 18:32:04 +01:00

RedMser commented

2023-11-24 18:36:23 +01:00

The problem seems to go away once I give the plane a material and untick "Transparent Shadows". Lighting also does not work at all until I do this.

RedMser changed title from ~~EEVEE Next: background darkens when adding objects~~ to EEVEE Next: lighting breaks / background darkens when using "Transparent Shadows"

2023-11-24 18:39:46 +01:00

JohnDow commented

2023-11-25 04:15:16 +01:00

I can confirm (4.1 / 42ddc13033). Opened up one of my scenes and the lighting and a lot of materials were broken. Had to go through most of them and disable "Transparent Shadows" to make everything work.

I can confirm (4.1 / 42ddc13033c2). Opened up one of my scenes and the lighting and a lot of materials were broken. Had to go through most of them and disable "Transparent Shadows" to make everything work.

Pratik Borhade commented

2023-11-25 07:59:35 +01:00

Unable to confirm in current main

**System Information**
Operating system: Windows-10-10.0.22631-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3050 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 546.01

Unable to confirm in current main ``` **System Information** Operating system: Windows-10-10.0.22631-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3050 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 546.01 ```

RedMser commented

2023-11-26 15:06:30 +01:00

I can still reproduce on a later build, but it seems I am missing a reproduction step: you must have entered EEVEE (legacy) render preview first, and then switched to EEVEE Next render preview. Updated the steps in the original report.

JohnDow commented

2023-11-26 20:53:30 +01:00

I can confirm.

I think it may have something to do with shader compilation. If I open up a scene and switch to the EEVEE-Next, then there is no issues. I can switch between Legacy/Next without any problem. BUT... If I switch to the Legacy version and then to EEVEE-Next (with subsequent shader recompilation), then there are issues with the transparent shadows, materials, background, etc.

I found a workaround (at least it works for me): Save you scene in Cycles mode. Close Blender. Open it again. Load the scene and switch to the EEVEE-Next. Enable 'Render preview' mode and wait for shader to recompile. Then you can switch between any render engines without any problems.

I can confirm. I think it may have something to do with shader compilation. If I open up a scene and switch to the EEVEE-Next, then there is no issues. I can switch between Legacy/Next without any problem. BUT... If I switch to the Legacy version and then to EEVEE-Next (with subsequent shader recompilation), then there are issues with the transparent shadows, materials, background, etc. I found a workaround (at least it works for me): Save you scene in Cycles mode. Close Blender. Open it again. Load the scene and switch to the EEVEE-Next. Enable 'Render preview' mode and wait for shader to recompile. Then you can switch between any render engines without any problems.

Pratik Borhade commented

2023-11-27 03:34:05 +01:00

Thanks @RedMser , can confirm now.

Pratik Borhade added

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EEVEE Next: lighting breaks / background darkens when using "Transparent Shadows" #115371