From: Bart Bruininks (
Date: Wed Jun 10 2020 - 05:22:39 CDT

Dear VMDers,

When I try to use the GPU accelerated interactive rendering on our
visualization server I get a black screen. Non-interactive rendering does
render correctly. Also the CPU rendering (OSPRAY) works fine both
interactively and non-interactively (though it is always so dark). I am not
sure if it matters, but the interfacing takes place over a NICE portal
streaming the screen.


Nvidia Drivers:
NVIDIA-SMI 440.82 Driver Version: 440.82 CUDA Version: 10.2

OptiXRenderer) Creating OptiX window: 672 x 805...
OptiXRenderer) VMD TachyonL-OptiX Interactive Ray Tracer help:
OptiXRenderer) ===============================================
OptiXRenderer) Using 2 devices:
OptiXRenderer) [0] Quadro RTX 8000 CUDA[0], 47.5GB RAM, KTO
OptiXRenderer) [1] Quadro RTX 8000 CUDA[1], 47.5GB RAM