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maybe it can be useful.   

Hello! I need to shape the density (falloff on particular axis) on the ocean interior geometry.  The Karma Volume (default) density is constant throughout the ocean interior obj. I tried converting the obj into a vdb to create a density attribute. Then I tried getting bbox min & max values manually using geopropvalue bboxmin, bboxmax & P > subtract > divide to get values and multiplied by the density. This doesn't seem to work as I get a half/half look most likely do to improper mapping...  Could someone please rectify this and make it work?   Thanks!     oceaninteriorfalloff_karma.hipnc

maybe it can be useful @racdew  example_bakeAnimation(1).hipnc

In solaris I have a material library with materials that match the name property of each primitive mesh in the scene graph. I can use use the material assignment node to assign one material to one primative. This works and in the scene graph you can see the material binding. see attached image below: However I want to do this with a wrangle and assign all materals to matching prims. in a wrangle : string name = usd_name(0, s@primpath); string mats = "/materials/"+name; usd_addrelationshiptarget(0, s@primpath, "material:binding", mats); as shown in this tutorial in the scene graph it looks like it has assigned the material relationship but the materail doen't show up in the viewport.    If there is an obvious mistake or if there is a beter way to assign all materials with the same names as prims in solaris please let me know.  Thanks you for  your attention.    

There is no simple solution to this. First of all where you need keys on obj level or inside geo sop? If on obj level you need to create geo sop per each piece, extract transforms and apply to geo sop and put pies to origin than bake animation with python script. if in geo sop you can just bake with python script. this is example script for bake camera you need to modify it: import hou selectedNode = hou.selectedNodes()[0] bakingNode = hou.node('/obj').createNode('cam', selectedNode.name() + '_bake') hou.setFrame(int(hou.playbar.playbackRange()[0])) for f in range(int(hou.playbar.playbackRange()[0]), int(hou.playbar.playbackRange()[1])+1): hou.setFrame(f) bakingNode.setWorldTransform(selectedNode.worldTransform()) bakingNode.parm("tx").setKeyframe(hou.Keyframe(bakingNode.parm("tx").eval())) bakingNode.parm("ty").setKeyframe(hou.Keyframe(bakingNode.parm("ty").eval())) bakingNode.parm("tz").setKeyframe(hou.Keyframe(bakingNode.parm("tz").eval())) bakingNode.parm("rx").setKeyframe(hou.Keyframe(bakingNode.parm("rx").eval())) bakingNode.parm("ry").setKeyframe(hou.Keyframe(bakingNode.parm("ry").eval())) bakingNode.parm("rz").setKeyframe(hou.Keyframe(bakingNode.parm("rz").eval())) bakingNode.parm('focal').setKeyframe(hou.Keyframe(selectedNode.parm('focal').eval())) bakingNode.parm('aperture').setKeyframe(hou.Keyframe(selectedNode.parm('aperture').eval())) bakingNode.parm('near').setKeyframe(hou.Keyframe(selectedNode.parm('near').eval())) bakingNode.parm('far').setKeyframe(hou.Keyframe(selectedNode.parm('far').eval())) bakingNode.parm('resx').setKeyframe(hou.Keyframe(selectedNode.parm('resx').eval())) bakingNode.parm('resy').setKeyframe(hou.Keyframe(selectedNode.parm('resy').eval())) bakingNode.parm('winsizex').setKeyframe(hou.Keyframe(selectedNode.parm('winsizex').eval())) bakingNode.parm('winsizey').setKeyframe(hou.Keyframe(selectedNode.parm('winsizey').eval())) bakingNode.parm('shutter').setKeyframe(hou.Keyframe(selectedNode.parm('shutter').eval())) bakingNode.parm('aspect').setKeyframe(hou.Keyframe(selectedNode.parm('aspect').eval()))