A lot of false information here- Superfly is a port of the cycles rendering engine- and they, at the moment, have not updated their CUDA code to iinclude the RTX/Turing based cards. Nothing to do with Renderosity and poser development staff. When Cyles updates than I would imagine the poser team will do the same. AMD cards do not support CUDA( which is Nvidia based) so if using AMD GPU's it would make sense to pair it woth an AMD XEN 2 processor and use the multicore CPU approach that Cycles and Superfly can also use. I find using CUDA in 11.2 is very quick and even with a middle range 1070ti is more than capable of using JURA's superfly presets.