Pierre Rousseau

Does someone know how to instantiate an .ass file sequence in Houdini that works with motion blur?

Setting a “instancefile” attribute on the points to load geo directly from the network works but only if I don't render with motion blur. Otherwise, I get an error:

00:00:00 1017MB ERROR | AiArrayGetMtx: out-of-range error in src/pygeo/arnold/instancer.cpp at line 604

If I use an “instance” attribute instead and load an .ass file with an “arnold_procedural” node, I can make it work but only if I check “load_at_init”, a parameter I can't get if I load directly the files from an attribute in my instancer. Everything would be easy if I needed static objects but I need a sequence. I tried the “instancepoint()” function in the path of the sequence on the “arnold_procedural” but it always returns -1, probably because that parameter is used inside the node at SOP level.

If anybody has an idea on how to make it works, it would be greatly appreciated .

Thanks a lot! That put me on the right track; never used the multisolver before.

And if I need a continuous emission rate, I can always use a Copy SOP with a Scatter SOP pluggued into it with $F as seed.

Is there an easy way to use particle instances as rigid body with Houdini 13?

I'm testing with a grid emitting particles over time. They interact with the ground without any problems but the shape used is point and not, in this case, cube.

I would like to keep them as particles so I could use POP VOP to control them but use cube as shape for interaction with the ground and each others.

Here is the test scene I'm working on.