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Instances into grains Oct. 16, 2018, 10:15 a.m.

PointsFromVolume will do it.

Here's Rohan's Vellum intro video that covers approximately what you're asking for.

https://www.youtube.com/watch?time_continue=1381&v=frTdG_FJFlQ [www.youtube.com]

[Solved] OpenCL setup for 17? Oct. 15, 2018, 10:50 p.m.

Ok, I managed to get it working (yay).

The problem was that there's a configuration for your choice of OpenCL device squirreled away at Edit->Preferences->Miscellaneous, and it was defaulting to the first OpenCL provider which was the Intel 630 Integrated graphics.

Combined with this, all the environment variables support suggested to override the behavior were apparently insufficient to override that Misc setting, and setting the Misc selection works when the env vars were not. So the complete solution was:

1) Set Miscellaneous preferences OpenCL to GPU and the appropriate Nvidia device.
2) Remove any and all extra OCL related environment variables from Houdini.env EXCEPT for:


which is still needed at least on my system to get it to load correctly.

Now OpenCL initializes successfully and vellum is successfully heating up the GPU. Woot.

[Solved] OpenCL setup for 17? Oct. 15, 2018, 6:01 p.m.

I've been working with support and trying different things with no luck so far.

I'm suspicious that it's related to the fact that this system has both Intel and Nvidia OpenCL, and perhaps Houdini has an issue such as that described in:

https://stackoverflow.com/questions/19140989/how-to-remove-cl-invalid-platform-error-in-opencl-code [stackoverflow.com]

Anyone running H17 successfully on a hybrid system with both Intel and Nvidia graphics?

I get -32 (invalid platform) or -33 (invalid device) generally in the console when it tries to initialize OpenCL. I can force it back to CPU only and that is successful using:


But every other permutation fails.