I had cached & look developed a few pyro sims in Houdini, reimporting the caches into my scene using the DOP I/O node.

I created the primary scene & camera movement in Cinema 4D, exporting the scene using Colloda & importing my camera movement & groundplain into Houdini.

Because C4D units don't translate well into Houdini, I had to send my Pyro simmed caches through transform nodes to dramatically increase their size (multiplying them by 500 - 1500) & therefore allowing them to fit my scene.

But after doing so, my carefully calibrated pyro shaders were thrown completely out of whack, and now my clouds look hard and plastic rather than wispy.

So in the process of increasing the overall size of these volumes/grids, something got messed up, and I'm not really sure how to bring them back to their former glory.

Maybe there's an option in the shader to compensate for size increases such as this?

Any help would be lovely. Thanks!

Luke

you can try this:

have you try the scale to Unit length in the Collada importer till you get the correct Units? (File > Import > Collada….)
or
put your camera and plane into a subnet (Shift-C) and scale the subnet till it fits.

there is also in the Preference the units where you can change but i'm not sure if it's the way to go.

Thanks Mandrake for thoughts; I'll look into the Collada import settings, as that's a more elegant solution that my fix, which was drastically changing the density settings on my cloud material.

I also had no clue about camera clipping settings + the light's clipping settings. The camera clipping settings in C4D are purely for viewport speed & don't have any effect on the render - so that caught me unaware.