Sean Lewkiw


About Me

CG Supervisor

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. See his IMDB profile at Sean has extensive teaching experience as Lead FX Instructor for four years. He focusses on the fundamentals so that you understand what you are doing and why you are doing it, so that you can take what you learned and actually use it to create new content. Sean has also worked with Sidefx Software creating documentation for Houdini itself. He has also been using Houdini since its inception!


My Talks

obj-image Worldwide HUG
Ocean Tools Quickstart

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

Recent Forum Posts

Why ramp and parameter nodes VOP are controlled outside? Sept. 28, 2022, 8:36 a.m.

In general, you should immediately promote all parms you expect to fiddle with. For small networks, not doing this might not slow you down, but for larger ones, it definitely will. Each time you change a value inside the network, the whole network has to be recompiled... whereas if you make the same changes to a promoted parm, the network is not recompiled.

Randomize multiple For Each Loops with one VEX function? Sept. 28, 2022, 8:31 a.m.

I'm not quite sure I understand... "AAA" is the name of the node you are referencing, this won't affect the results of the expression.

I am attaching a file that shows pretty much what you have above... (your expression was missing some double quotes, and I used a spare input, which is always good practice as this will allow your loops to be compiled).

EDIT: I just re-read your post and missed the "multiple" part... so this may not help


RBD Fracture Material Issue. Sept. 23, 2022, 9:10 a.m.

It would help if you could post a hip file, but probably you can probably fix this by turning the noise to "None" in the "Fog Volume" settings.