Updated mesh break brush strokes

[Kharak]

Greetings,

I'm looking for a little help here, I have a mesh with quite a lot of brush strokes on it and I'm wanting to remove or reposition a couple of small pieces, however doing so ends up breaking a huge amount of my brush stokes.

Here you can see that either deleting or moving this one small object on the left, breaks the brush strokes on most of the whole surface below it.

Nothing is changing on the mesh aside from deleting or moving that small boxt and reexporting.
The UV is the same minus the island for the removed box, in the case of moving the box unaltered, and the mesh as a whole has not moved.
Note, preserve brush stokes is emabled.

I'd love to know what the cause is and how to correct or prevent it from happening, I have several of these small boxes across the mesh I wish to remove or relocate, and would rather not have to redraw hundreds of lines.
Cheers!

[Cyril Dellenbach]

Hi @Kharak,

Thanks for the message.

Painter uses three elements to reproject the textures correctly:

1. The brush strokes (all the strokes made in the viewport are saved in the project file)
2. The camera position of every stroke.
3. The bounding box (which is basically an invisible cube which encases the entire model)

When you reimport a 3D model, Painter takes the first stroke made in the project, and based on its camera position reapplies the strokes on the bounding box. It then repeats this process for the second stroke, the third, and so on.

The great thing with this workflow is that UVs are rarely an issue for reprojection, even with UVs that are completely different, before and after any changes to the model – though this isn’t the case for masks made with UV islands, or strokes painted in the 2D view.

The downside of reprojecting the strokes on the model is that Painter runs into problems when the 3D object has changed. Considering you're editing the 3D model, problems are to be expected.

Regards,