Hernan S

Not quite sure why you are using the old RBD solver. Here is another quick version using Bullet which is much better suited for this kind of stuff and is faster.

If you use vanilla MatX and not the Karma side of thing sharing shading networks should work just fine between Houdini and Maya. Basically, almost everything works fine nowadays that Maya USD is more mature. However, you can still run into issues if you use Maya vanilla USD, if you go through the Bifrsot Graph and author there you can pretty much accomplish the same thing as Solaris, and is procedural, so keep both DCCs running procedurally if you need to.

There could be a variety of reasons why you are getting different results, such as different MOP versions, it might not be related to MOPs at all and it could RS, without a scene these are just guesses. Your best bet is just caching the end result and rendering.