Forums Houdini Indie and Apprentice Cleaning attributes on FBX import.

Cleaning attributes on FBX import.

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Mike_A
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Guys,
As a new user I've been having a real problem applying materials to FBX imports.

I then realised there was a 'shop_materialpath' attribute ('Level 1' being the value) on the fbx import.
How can I clear this globally - at the OBJECT level? AFAIK I can only connect nodes such as 'atribute delete,' or 'clean geo' node at the GEO level?
Or alternatively how can I do it en-mass with the 400+ nodes in my subnet?

Or is there a better way to approach this?
Edited by Mike_A - Aug. 5, 2022 14:52:23
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jsmack
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Use python to loop through the nodes imported by the fbx and append an attribute delete node to the render sop for each geo node in the fbx
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Mike_A
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Thanks. Unfortunately I've no idea how to program in Python.
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tamte
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select your FBX object subnet(s) that contains the imported fbx objects and paste this into python shell or create shelf button out of this

nodes = hou.selectedNodes()
for fbx_subnet in nodes:    
    if fbx_subnet.type().nameWithCategory() != "Object/subnet":
        print("Skipping {}, not a valid Object subnet".format(fbx_subnet.path()))
        continue
    
    for node in fbx_subnet.children():
        if node.type().name() == "geo":
            render_node = node.renderNode()
            mat_attrib = render_node.geometry().findPrimAttrib("shop_materialpath")
            if mat_attrib:
                ad = render_node.createOutputNode("attribdelete")
                ad.parm("primdel").set("shop_materialpath")
                ad.moveToGoodPosition()
                if node.renderNode() == node.displayNode():
                    ad.setDisplayFlag(1)
                ad.setRenderFlag(1)
Tomas Slancik
FX Supervisor
Method Studios, NY
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jsmack
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tamte
select your FBX object subnet(s) that contains the imported fbx objects and paste this into python shell or create shelf button out of this

how kind
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Mike_A
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tamte
select your FBX object subnet(s) that contains the imported fbx objects and paste this into python shell

Tomas,
Many thanks for this, I very much appreciate your time, generosity and expertise. It solves the problem.

Having done some further investigation my suspicion is that the issue lies with the fbx file itself. Having done an 'import-re-export' with another application, the problem doesn't seem to occur. With the original fbx, despite being imported 'geometry only' - no materials, it seems it was triggering H to generate a shop_materialpath attribute for no obvious reason.

Your script will be very helpful if we come across this issue again.

With thanks,

Mike A.
Edited by Mike_A - Aug. 6, 2022 10:51:15
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Mike_A
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Issue confirmed by Sidefx as a bug - ID# 123352.
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