Hi. Sorry for the delay getting back to you. Volume rendering is undergoing large changes in OSPRay 2. I'm working on the unstructured volumes and we are working on sampling improvements for these. From the issues you've been filing it appears you have some interesting unstructured datasets. Would it be possible to share any of them with us for internal testing? Thanks!

Is the v2 API with respect to volumes currently in flux as well? For example, parameters gradientShadingEnabled, singleShade and adaptiveSampling all seem to be missing from the code, preIntegration is now a parameter on the transfer function instead of the volume, etc.

@timrowley I have some unstructured datasets I can gladly share with you, however I cannot post them publicly. Please let me know where I should contact you by email.

All sampling rate concerns are now a renderer parameter and intentionally do not affect isosurfaces, as isosurface intersection is now entirely Open VKL's job. We have made improvements with VKL's isosurfacing code, so testing again on OSPRay v2.0 should show improvements.

Pinging @gregjohnson here for reference.