Should I apply subsurface modifier before UV unwrapping?

Question

I've got an object I'm exporting to Substance Painter and I have UV unwrapped it with a subsurface modifier on the model.  All looks good in Blender and in Substance Painter until I apply a texture in Substance Painter and then I get strange artifacts where the subsurface is causing the most alterations to geometry.

I've tried using a triangulate modifier in combination with the subsurf modifier, but that didn't help.

The only thing that helped was applying the subsurf modifier before UV unwrapping.  Is this the correct workflow to have to do this?

  • Martin Bergwerf replied

    I have never used this, but there is a setting, when you unwrap:

    Subsurf_UV.png

    I think that should do what you want.

  • Omar Domenech replied

    I would apply the modifiers if I were to export a model, but I rarely work outside of Blender these days, so I'm not exactly sure. I do remember JL doing the UV Smooth setting on a couple of tutorials, in the SubD modifier, under advance. Maybe that helps you. 

    JL explain UV stretching and other facts on this lesson:

    https://cgcookie.mavenseed.com/lessons/fixing-uv-skewing-and-stretching


    Capture3.jpg

    Capture4.jpg


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