Good day Magicians,
Redshift3D has had Day 1 support of Houdini 18.5 here: Houdini/Solaris plugins [www.redshift3d.com]
There's a small caveat, there is currently an issue with py3 builds of Houdini and our Solaris/USD plugin - we're working on a fix for that. So, if you are using a recent py3 build of Houdini 18.5, Solaris rendering is unavailable as of 10.29.20, but ROP rendering works fine in py3.
I'l update this post once py3 Solaris support comes online.
For those Users that are on the regular (py2) build of Houdini - there are currently no rendering issues as of 10.29.20
Thanks.
PS - make sure you are configuring Redshift in your houdini18.5 folder, as this is a minor version bump guys, so there's a new $HOME folder.