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LaszloFX posted a topic in ScriptingHey Guys! I have a pretty newbie question about some Python and HDA interaction. So in a nutshell I'm trying to create an HDA with implemented Python script which does the following: 1. I have an Original Geo, which is object merged in my HDA. 2. I select some primitives on my original geo (or on the HDA). 3. After I selected my primitives, with a press of a button on my HDA, the selected primitives will be added to a group's pattern parameter inside my HDA. 4. And of course it would be great if this could work with a relative reference, so if I copy my HDA multiple times it'll update the groups within the correct HDA. I have this code so far: import toolutils viewer = toolutils.sceneViewer() geo = viewer.selectGeometry() s = geo.mergedSelectionString() # How can I make THIS PATH relative reference? n = hou.parm('/obj/Colorzied_Geo_Asset_1/Colorized_GEO/group1/pattern') n.set(s) I put together a pretty simple example file and the hda, which will hopefully help you guys understand what I'm trying to achieve. In case my explanation is a little confusing. selectedPrims_python_problem_v001.hip colorzied_geo_asset.hda Any help or nudge in the right direction would be greatly appreciated! Thanks in advance! Best, Laszlo