isah_voodoo Posted July 24, 2019 Share Posted July 24, 2019 Hello, I am creating a couple of volumes with the vdb from particles node and I realized that I have no idea how to combine my velocity fields into one. I am trying to use the VDB combine and VDB vector merge . But it is not working. When I visualize my velocity field. It doesn't look right. Someone please help. vdb_velocity_combine.hip Quote Link to comment Share on other sites More sharing options...
Andrea Posted July 24, 2019 Share Posted July 24, 2019 (edited) Hi, you should just use VDB combine and not VDB vector merge. Just plug two volumes at the time in the input A and B , then switch Operation to "Add" VDB vector merge is for merging vector volumes that have been split for some reasons, for example when you have 3 volumes that are named @vel.x, @vel.y, @vel.z Edited July 24, 2019 by Andrea Sbabo Quote Link to comment Share on other sites More sharing options...
isah_voodoo Posted July 25, 2019 Author Share Posted July 25, 2019 @AndreaHi andrea, thank you for your response. I did what you said and it still does not combine my vel fields together... vdb_velocity_combine2.hip Quote Link to comment Share on other sites More sharing options...
Andrea Posted July 25, 2019 Share Posted July 25, 2019 (edited) What you are doing wrong is how you connect the two inputs. Apparently is not possible to connect both the A input and B input to the same merge node. The node than don#t know anymore what is what. Also you don't need to specify Group A and Group B vdb_velocity_combine2_fix.hip Edited July 25, 2019 by Andrea Quote Link to comment Share on other sites More sharing options...
isah_voodoo Posted July 27, 2019 Author Share Posted July 27, 2019 @AndreaThank you sir Quote Link to comment Share on other sites More sharing options...
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