I am trying to increase the size of this fbx model at least 10x, if not 100x. (I can convert to iprop if needed.) I need base texture resolution to be higher, and I can do this in Photoshop, (see below,) but it isn't working. Blurry and pixelated. Is there a way? Thanks for any steps needed or help!

Try Topaz Gigapixel AI for upscaling textures, from my point of view it's very good, worth its money.

______________________________________________________________________________
Software developer. iClone hobbyist since January 11, 2020. Best work so far: Robots among us: The Lab and The sad end of a legend
In progress: Black Mamba
AMD Ryzen 3950X 16C/32T 4.2 GHz, 64GB RAM, RTX2080 11GB, 2TB Samsung 970 Pro SSD, 8TB Seagate BarraCuda HDD, Win11 64-bit, iClone 8.12

Thank you!