<div dir="ltr"><div><div><div><div><div><div>Hello everyone,<br><br></div>I wonder how
does OSPRay-based volume renderer in VTK, used in ParaView, is able to
produce volume images with smooth surface from the first pass (without
buffer accumulation).<br><br></div>OSPRay raw volume rendering e.g.
using OSPRay demos, results in very densly sampled volumes. It looks
like only one sample per voxel is taken which results in one pixel per
voxel colored in the first pass at some regions (image 1). Only after
several accumulation passes the rendering produces smooth image (image
3).<br><br></div>In contrast to that, volume rendering in ParaView via
OSPRay shows smooth image after first pass (image 4) with a little bit
of densly sampled artifacts. It actually looks like no frames
accumulation is active at all, because I no difference is visible
between moving and resting camera. Zooming in also keeps the image
smooth (image 5).<br><br></div>Any articles or hints about what is going
on behind the scenes? I'm digging into the VTK source code but no
understanding so far. OSPRay seems to be configured just like I do in my application, but VTK seems to do the magic somewhere else.<br><br></div><div>Screenshots or standalone OSPRay and ParaView-OSPRay renderings are attachend.<br></div><div><br></div>Best Regards,<br></div>Alexander Devaykin</div>