(At this point I'm just documenting my discoveries here for anyone who might run into the same problems)

Ok so Render in Background seems to get stuck in Loading textures nearly every time. So at least to me:

-Render in Background is broken

-Progressive Refinement is broken

Which for me is very bad news, as I like leaving a render cooking for a bit and stop it midway, just to check if my lights and textures are good and if I have pokethrough in my scene.

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Feel free to call me Ohki!

Poser Pro 11, Poser 12 and Poser 13, Windows 10, Superfly junkie. My units are milimeters.

Persephone (the computer): AMD Ryzen 9 5900x, RTX 3070 GPU, 96gb ram.