FilterForge awesome program always use it on my textures i create. Also suggest free program Materialize it will help create the PBR's . Now Substance painter that's a different ball game you need a powerful computer i think every one on youtube tutorials hove very powerful computers like Michael Pavlovich https://youtu.be/IrrcH4BFmGY he has a high end third gen thredripper system, not cheap. I don't really know how the sub works on low end computers any info, of personal experiences?? pleas tap in.