denyas 0 Posted January 8, 2019 Hi guys, I simulated fumefx vdb with velocity channel in 3DSmax fumefx and i used maya arnold volume to import VDB. How do i render the the motion vector for the VDB ? i tried motion vector VDB and it doesn't work. any help would be great. thanks Share this post Link to post Share on other sites
Howitzer99 20 Posted January 8, 2019 I'm not familiar with importing FumeFX into Houdini, but internally for Houdini, it's expecting to have velocity as a vector parameter named "vel" for it to pickup and use motion vectors during rendering. Check which parameters are coming in from the FumeFX VDBs, you may need to just rename the velocity attribute. Here's a link from SideFX's site with some more info: https://www.sidefx.com/forum/topic/43574/ Share this post Link to post Share on other sites
denyas 0 Posted January 9, 2019 19 hours ago, Howitzer99 said: I'm not familiar with importing FumeFX into Houdini, but internally for Houdini, it's expecting to have velocity as a vector parameter named "vel" for it to pickup and use motion vectors during rendering. Check which parameters are coming in from the FumeFX VDBs, you may need to just rename the velocity attribute. Here's a link from SideFX's site with some more info: https://www.sidefx.com/forum/topic/43574/ Hey million's Thanks for the reply, i got my fumefx to export velocity as VelocitiesX VelocitiesY VelocitiesZ channel. but i am not sure how do i do the connection in maya. Share this post Link to post Share on other sites
anim 1,192 Posted January 9, 2019 13 hours ago, denyas said: ... i got my fumefx to export velocity as VelocitiesX VelocitiesY VelocitiesZ channel. but i am not sure how do i do the connection in maya. just put those names into Velocity Grids parameter as the guide describes https://docs.arnoldrenderer.com/display/A5AFMUG/Volume#Volume-VelocityGrids Share this post Link to post Share on other sites
denyas 0 Posted January 10, 2019 9 hours ago, anim said: just put those names into Velocity Grids parameter as the guide describes https://docs.arnoldrenderer.com/display/A5AFMUG/Volume#Volume-VelocityGrids thanks i got it working by using volumefloatrgb and export the xyz channel as rgb Share this post Link to post Share on other sites
Howitzer99 20 Posted January 11, 2019 Cool, glad it's working! Share this post Link to post Share on other sites
AlexNardini 20 Posted June 6, 2020 Hello, this reply came in very late but you can use this free HDA to handle FumeFX VDB caches inside Houdini, support from VDBs coming from FumeFX v5 and up: https://www.orbolt.com/asset/alexnardini::FFX_import::2.0 And use its companion HDA for any FumeFX VDB Layout needs: https://www.orbolt.com/asset/alexnardini::FFXVDD_import::1.0 Best, Alessandro Share this post Link to post Share on other sites
