Help request for substancePainter texture channel UV premultiplied

  For our own asset pipeline construction, we need to use SP's custom channel as a data map. The custom shader then reads the texture as the basis for rendering. Textures are generated by the texture generator created by SD. Reference file: temporaryPlan.spp, see Shader: Toon.glsl, as shown.

  Render the final result correctly

  Layer settings

  Cartoon Map User Channel

  SP defaults to premultiplied UVs and expands the channel map, which causes the data map to not read as expected, as shown. Reference file: bad.spp, as shown.

  render result

  Data channel error due to premultiplied UVs

  Because the relevant settings were not found, and the related API could not close the texture premultiplication and expansion for a certain channel. So try to use another auxiliary patch with fully unwrapped UVs to solve the problem.

  Hope, whether the official can provide relevant solutions. Or increase the corresponding settings of the channel. Or provide APIs that can control related functions.

  demo file

https://drive.google.com/file/d/1-9xalr7fYIiOfxXotG1I8yWjKgGbmuMm/view?usp=sharing