Sean Lewkiw


About Me

Sean has over 25 years of VFX production experience as a VFX Supervisor, DFX Supervisor, CG Supervisor and Houdini FX artist. His credits include Lord of the Rings, Superman Returns, Golden Compass, Watchmen, Mazerunner, and many many more, and stints at Weta, DNEG, Method, Framestore and others. S...  more
CG Supervisor



Houdini Skills


Not Specified

My Tutorials

obj-image Beginner
Material Based Destruction
obj-image Beginner
Build a Molecule HDA
obj-image Quick Tips
How to Eat An Elephant | Learning Strategies
obj-image Beginner
Solaris Lighting
obj-image Intermediate
Material Based Destruction
obj-image Beginner
Solaris: Working with USD

My Talks

obj-image HUG
Ocean Tools Quickstart

Recent Forum Posts

Constraints Not Following Deforming RBD Objects June 12, 2023, 2:03 p.m.

Is this what you are looking for?

I had this issue a long time ago when teaching a similar effect... trying to get a plane to disintegrate when it hit the ground while maintaining the anim for the part of the plane that did not disintegrate.

Key here is to use the extract transform setup to make the geo animated instead of deforming (this is a good trick to greatly speed up any "deforming" geo sim anyway). Also, lock the constraints at the rest frame.

Note the attrib transfer for active/deforming. You could add another for when the cubes hit the ground. Also you can make a more sophisticated attrib transfer where the two objects collide, this is obviously just proof of concept.

Note the bullet solver SOP is unlocked so I could change it to "animated static" geo. This option is not promoted to the top.

Full disclosure, I didn't figure this out myself, Sidefx helped me with the solution.


Cinesite Montreal - Senior FX TDs and Houdini Pipe TDs May 23, 2023, 5:03 p.m.

Cinesite is looking for Senior Houdini FX TDs and Houdini Pipeline TDs. []

Automatize file export March 2, 2023, 9:52 a.m.

Try this....