The problem with Substance is that it uses the composition images for a PBR shader or newer systems of composing. Sims 4 images vary from most games. The normal map is transformed into a bump map (kind of), then you have a specular that it has rules specifically for Sims 4 and just reflects another static image (cube enviroment), and then you have a diffuse with every color and details composed into it. Substance painter shaders have a lot of other images that won't work for TS4.
For example, for doing metal, you won't be allowed to import the specular or shinyness maps from substance. One way to work around this is to bake the maps into a single image and use it as a diffuse. The only tutorial that i've found regarding this is the following:
HERE. However, if you know how to use Substance maybe you can find a way to get around this, or a more efficient way to bake the details. If you do, please share! Good luck.
Please do not PM me to help you with your creating problems. You can post in the Creators Help so everyone can see the problem and solution.
nbx9393 did you try resizing it in photoshop first? I just downloaded substance painter for its materials. I'm learning how to use it
Don't know if you figured it out or still need help but what I did was export texture and choose the png 8bit and size 4096x4096. Then in photoshop I opened the texture png and reduced the image width by half to get a 2048x4096 png. This exports into sims4studio fine.
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