Not much to say here, add more geometry. There are tricks that exist like tesselation but they're not worth implementing when adding another lod will solve it.
Seemed to have partially solved the problem if the normal maps are disabled, however with normal maps on there is just a tonne of noise! Diffuse Only: Diff + Normal:
If you are using a NVidia card, go to the Nvidia control panel ,on the previsualization options select ''Let the 3D application decide". This will solve your problem.
Throttlekitty, you were right, deselecting the extruded faces before going into object mode and mirroring seems to solve the problem. Thanks for your help!
I love you. Deleting the custom split normals solved the shading issues I think entirely (have to do a closer look). I didn't know that was a thing until now. I'm honestly not sure how autosmooth does the calculation. Is it anything above the number or below the number (< than 90 or than 90. )
Solved it: got rid of Parray and SuperSpray, remade whole system on PFSources with editable polys insead of blobmesh as geometry, then baked particles with PFlowBaker and exported it to FBX
I am sorry for the politic thread here. I am really worried about this. But what it is your thoughts about the situation in Ukraine? Is there indication for World war 3? Or it can be solved in diplomatic way?