Hi. I've been having a problem rendering Pyro using the Micropolygon renderer. Most frames turn out fine, but once in while, maybe one frame out of 20 or 30, there is a rendering artifact of bright vertical streaks. See the attached image, where I show one frame looking fine, and the next with the artifacts.

This problem does not happen when I use Ray Tracing, so I've been doing that so far on final renders. However all documentation says that Micropolygon is the way the go with Pyro, and it does seem to render faster, considering I have to crank the sampling very high on Ray Tracing to get equally smooth vapor.

I'm new to Houdini, but have done several Pyro assets by now, and seen the problem with all of them.

Can anyone help me?

Thanks!

Please log a bug and include your scene file, hardware and OS specs, the version of Houdini you're using….you know, the usual stuff for logging a bug. Thanks!
https://www.sidefx.com/forum/topic/15603/ [www.sidefx.com]

Okay, bug logged now.