Evan Robinson


About Me

VFX Artist

Maya vfx artist/student switching to houdini.


Recent Forum Posts

terrain detail on steep slopes Nov. 29, 2018, 11 a.m.


It was briefly mentioned in the this post but I didn't really see a solution that worked for me.

https://forums.odforce.net/topic/40201-workflow-for-creating-terrain/?tab=comments#comment-193820 [forums.odforce.net]

I seem to struggle with getting detail in areas of terrain with a steep angle. Anything else I can do just fine. Any ideas on how to improve detail in areas with large/steep slopes?

Erosion results seem absolutely horrible on steep slopes for me. It seems I get worse muddier results with new erosion node : (

see how much detail I have on the less steep areas.


Swirling Motion Pyro July 23, 2018, 10:53 a.m.


I am having a difficult time figuring out the best way to get swirling motion in a pyro sim. In Maya, we have the swirl attribute.
You can see the swirling motion in this sim that I did here: https://vimeo.com/141476011 [vimeo.com]

Disturbance doesn't seem to add swirl, but random detail to make the sim look more interesting. You can easily break the sim and get weird patterns if this is turned up too much.

Turbulence seems to add somewhat of a swirling motion, but in every direction rather than in the direction the smoke is headed. As the documentation says, its works best at large scale

I tried the seed vorticles shelf tool. It is slow and doesn't seem to work well with resizing containers. It's ok when used at low scale. It creates weird patterns when scaled too high.

I tried many micro solvers. Gas confinement seems good, but there isn't really a way to set the scale of the swirl. I tried remapping and that helped a little bit. Gas vortex equalizer also creating strange patterns. The only micro solvers that seemed to add swirl are gas vortex boost and confinement.

I also noticed that you can often tell if a simulation is done using pyro because of patterns that disturbance and turbulence create. Take a look at some of these pyro simulations. They all have the same pattern that disturbance creates. The other look you can get from pyro is from using a lot of confinement. It creates a lot of swirling motion, but very tiny swirls.

https://vimeo.com/album/5305665 [vimeo.com]

Any help would be greatly appreciated.

VDB sop July 20, 2018, 8:39 a.m.

thanks : )