Difference between turn on "Create Packed Fragments"or not

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Hi,I would like to know What's the difference between turn on "Create Packed Fragments"or not on Assemble node? I tryed use the example file in this node's help doc,but seems no difference .

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I'd suggest reading https://www.sidefx.com/docs/houdini/model/packed.html [www.sidefx.com]
If the toggle is off, Packed Geometry primitives are created instead. Both will "work" but are optimized for different use cases: in your case, for fractured pieces you should be using packed fragment primitives.
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Semi-related. I know for fractured pieces, using packed fragments is more efficient. But the viewport stops showing the materials:





How could I show the materials for packed fragments? Or am I supposed to just unpack them after simulation?
Edited by raincole - March 7, 2022 14:02:52

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You probably only need to pack the proxy geometry going into the simulation, and transfer the motion to high-res geometry afterwards
I believe this is just a viewport limitation, though, as the materials are e.g. rendered in mantra if the Declare Materials parameter is configured to include all shaders in the scene
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cwhite
I'd suggest reading https://www.sidefx.com/docs/houdini/model/packed.html [www.sidefx.com]
If the toggle is off, Packed Geometry primitives are created instead. Both will "work" but are optimized for different use cases: in your case, for fractured pieces you should be using packed fragment primitives.

Thank You!
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