OSPRay: volume rendering is not displayed before an interaction event
The problem appears with the OSPRay volume mapper in PV 5.3:
Rendering is not performed or not performed correctly when enabling the "OSPRay Based" volume rendering mode.
To reproduce: Create a Wavelet, show it with Volume representation and select "OSPRay Based": image is cleared and the cube won't appear until you perform a mouse action in the view.
Edited by Vicente Bolea