Advances in OptiX and RTX ray tracing bring tremendous performance improvements for rendering scenes from technical and scientific visualization workloads. New OptiX acceleration structures enable rendering of scenes with much greater geometric complexity on a single GPU, making it possible for scientists to interactively render high fidelity visualizations of complex scenes. This talk will describe the results from the adaptation of VMD, a widely used molecular visualization tool with over 100,000 users,to exploit the latest capabilities of OptiX.