Let me know how this goes, and if you can export. Turn off denoising, Turn off GPU light Cache(to have as few variables as possible). In Max,Maya,Houdini and pretty much all other plugins this setting is hidden and is controlled by Vray automatically. One issue in this screenshot here is GPU bucket size of 32, this is very bad (even if it is the default setting in Vray Rhino, the devs need to change this). On another note, RTX uses a bit more VRAM, this is expected to happen and shouldn't affect you (knowing that Cuda only uses 40% of your VRAM for your scene) In the recent Vray builds, RTX stability has been better in my testing (I use GPU rendering almost exclusively for my work)
In my testing, RTX is 50% faster than Cuda in similar interior scenes.
The advantage on using RTX is far too good honestly, to even consider Cuda at this point.
