Polybrush glitches out my whole mesh when using prefab mode

When using the Polybrush (latest version) prefab tool to place objects, my custom mesh just bugs out completely. I have to remove the component that is added to fix it, but in doing so I can't place the objects using this tool.

I tried using vertex streams option for the component but then I can't place objects where I want.

Any ideas how to fix this, as I prefer to use this tool over others (which don't have this problem but are missing some features I need).


Before:



After when moving mouse over the mesh after clicking the prefab tool.

 

Hi,

I have a low poly terrain which looks like this...



It also happens when I use the Smooth Mesh Geometry option. The other options I can't use as it says my material doesn't support vertex colors, or texture blending, which is fine as I only need it for prefab placement.

 

Unity 2020.2.0b2 (using URP latest)
Polybrush 0.9.15

I have had it happen on previous low poly meshes using stable releases of tools and Unity, but could never pinpoint the issue, so I always gave up on using Polybrush. I recreated another low poly mesh and it didn't happen. But my current mesh, it happens every single time.

 

I am using the latest, I was looking at assets and not installed packages.

I don't think it is Polybrush that is the issue, I think it is my low poly mesh. I tested various low poly meshes I created in Blender, and sometimes they have issues, were others did not.

Some meshes the faces glitch out.
Sometimes I just can't place any prefabs on certain faces of the mesh as well.

I think I will go back and look at the meshes and see. I think it could be the way I am decimating them in Blender perhaps. I can send you the mesh if you like, but I feel the issue maybe with me and not your tool after doing more testing.

 

Hope it's alright that I am commenting on a dead thread after such a long time, but I just spent like 2 days dealing with the same problem, and I think I found a solution. I stumbled upon a few threads with no answers, so I thought I would share it in case someone else has the same issue

With your broken mesh selected, got to the Tools tab -> PolyBrush -> Bake Vertex Streams. Then under Bake Options, click on Apply to current mesh. This seems to fix the broken vertices, and all functions of Polybrush seem to then work fine.

I am using Unity 2021.3.8 and Polybrush 1.1.3. The Polybrush docs say that this is a deprecated function and will be removed in a future update. I am not sure why, but in any case, this was what saved me.

 

This still seems to be an issue as of Unity 2022.2.9 with Probuilder 5.0.7 and Polybrush 1.1.4. I was able to work around the issue by checking the "Use Additional Vertex Streams" option in Preferences > Polybrush. It still acts like it's going to break momentarily but then snaps into working when I start painting.

 

Thanks man, you're a lifesaver. I'm amazed they haven't fixed this yet in 2023.