exel Posted May 14, 2014 Share Posted May 14, 2014 I always assume I'm missing something obvious. I'm doing some FLIP tests and would like to stick with VDB to create my meshes. Using the "VDB from Particle Fluid" SOP seems good-ish, but I'm left with a mesh that won't motion blur in mantra. So far I've tried creating another vdb using "vdb from particles", and sampling in "v" (using the additional point attributes options), and then transferring it over to the mesh with an Attribute from Volume SOP, but that doesn't seem like the greatest approach, and effectively doubles the amount of cooking involved. And I want to avoid the attribute transfer SOP for this, things will get ugly if I try to crank up the resolution. Maybe the "VDB from Particle Fluid" SOP just needs the same point attribute options that "VDB from Particles" has? Would it be better to pull the surface volume from DOPs and work with that? (instead of importing the particles) Thanks for any tips you can provide! -JS- Quote Link to comment Share on other sites More sharing options...
Skybar Posted May 14, 2014 Share Posted May 14, 2014 Whats wrong with AttribTransfer from the particles to the mesh? Thats the way the shelf tools is set up anyway. For a while they had a wrangle sop with a pointcloud thing, which basically did the same thing and the time difference was (or is now) neglible. If you want the vel as a field, you already have that from the sim. Why not import that and convert to a VDB or what you now want to do. Quote Link to comment Share on other sites More sharing options...
exel Posted May 15, 2014 Author Share Posted May 15, 2014 Whats wrong with AttribTransfer from the particles to the mesh? Thats the way the shelf tools is set up anyway. For a while they had a wrangle sop with a pointcloud thing, which basically did the same thing and the time difference was (or is now) neglible. If you want the vel as a field, you already have that from the sim. Why not import that and convert to a VDB or what you now want to do. Thanks David, Woops, yeah, pulling the vel field out of DOPs is smarter, thanks. I'll keep experimenting, I'm hoping to come up with technique that will scale up well when I start getting upwards of 8 or 10 million particles... Attribute Transfer is performing better than I remember, so I'll stick with it for now. Quote Link to comment Share on other sites More sharing options...
Skybar Posted May 15, 2014 Share Posted May 15, 2014 The biggest I've done yet had 30mil particles, and I had no problems using AttribTransfer there. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.