Baking in multi-Tiles textures (Udim) from MultiRes only use the height of the last tile as reference #109302

New Issue

AkMC · 2023-06-23T18:52:18+02:00

AkMC commented

2023-06-23 18:52:18 +02:00

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 536.23

Blender Version
Broken: version: 3.5.1, branch: blender-v3.5-release, commit date: 2023-04-24 18:11, hash: e1ccd9d4a1d3
3.1 was OK on the first tile [but it didnt support baking UDIMs at all -- that came with 6787cc13d4], 3.2 already had this strongish contrast

Short description of error
Baking in multi-Tiles textures (Udim) from MultiRes only use the height of the last tile as reference

Exact steps for others to reproduce the error

Make an object.
Unwrap the UV on several Udim Tiles.
Add a MultiRes modifier.
Sculpt it, but make sure to not sculpt any faces unwrapped on your last tile: you'll have no value on your texture, only a 50% grey image.
Now, sculpt the faces unwrapped on the last tile, but VERY slightly: you'll get a displace texture with too much contrast on the previous tiles (see the jpg image on attached files).
Bake your displace on a new Udim image with all the necessary number of tiles.
Here, you can see on the previous tiles that the displace has too much contrast and can't be used to get a correct result.

PS: It has been tested on the .blend file in attached files with 2 tiles AND on another file (a dragon with only its wings membrane unwrapped in the last tile) with 4 tiles.

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 536.23 **Blender Version** Broken: version: 3.5.1, branch: blender-v3.5-release, commit date: 2023-04-24 18:11, hash: `e1ccd9d4a1d3` 3.1 was OK on the first tile [but it didnt support baking UDIMs at all -- that came with 6787cc13d4ef], 3.2 already had this strongish contrast **Short description of error** Baking in multi-Tiles textures (Udim) from MultiRes only use the height of the last tile as reference **Exact steps for others to reproduce the error** 1. Make an object. 2. Unwrap the UV on several Udim Tiles. 3. Add a MultiRes modifier. 4. Sculpt it, but make sure to not sculpt any faces unwrapped on your last tile: you'll have no value on your texture, only a 50% grey image. 5. Now, sculpt the faces unwrapped on the last tile, but VERY slightly: you'll get a displace texture with too much contrast on the previous tiles (see the jpg image on attached files). 6. Bake your displace on a new Udim image with all the necessary number of tiles. 7. Here, you can see on the previous tiles that the displace has too much contrast and can't be used to get a correct result. PS: It has been tested on the .blend file in attached files with 2 tiles AND on another file (a dragon with only its wings membrane unwrapped in the last tile) with 4 tiles.

Bake_Udim_Issue_A.blend

1.6 MiB

Bake_Udim_Issue_B.jpg

988 KiB

👀 1

AkMC added the