UV unwrapping and blender

hi everyone, so i’ll try to be clear as i can with this problem. so i’m using unwrapping in blender and got the hang of it. Now when I put it in substance painter, i have it where i set up a height pattern and i use a mask so it only effect a certain polygon. However for some reason, some of the detail of the height goes on other polygon even those are seperate of each other. Here i have a screenshot to show how this repeat pattern is going on the edge of the other polygon yet when i turn on the black and white it doesn’t show any sign of white that show it

Texture it normally in Blender. That might show up a problem, like flipped normals.
No idea about Substance Painter.

Looks like its overlapping UV’s somehow.
Unfortunately i am only at the stage of opening substance painter and seeing it mess up the maps at the moment so i cannot help on that side :frowning:

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As @Marc_Carlyon said, it is probably your Blender UV-(un)Mapping.
The mesh parts, called islands are to close to each other.
You need to take into account for a bleeding (paint) edge.

While vertices, edges are mathematical accurate after many zero’s after the dot (0,000001).
But your bitmaps are a bit om the low pixel resolution, according to the mesh coordinates (vertices, edges).
So there is always an overlap needed on your mesh islands on a UV-map.

Blender has even an option for the image bleed.

While a lot of people are using Substance Painter, the same effects can be achieved in Blender.
So it is better to understand how it works in Blender before jumping to another tool.

Added note: You need to place also the seams at the correct edges, to make islands possible on texture changes.

Yeah sorry for the mess, part of a gamejam and wanted to figure out the model so rushed thru it. I will say I figured out what I could do to fix it thanks to some input but I appreciate you taking the time to help me out. One thing I didn’t know about is with blender when I unwrap to make sure the margin isn’t at 0 and mine was .00001. Second I had it where I could change the uv padding from 3d space neighbor to uv space neighbor. Thank you all for taking the time to help me out.

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