okay the docs you gave were great for insight
working code to change parameter of roughness for x given mat selections
import c4d
import maxon
from maxon import GraphDescription
doc = c4d.documents.GetActiveDocument()
# Get selected materials directly
selected_materials = doc.GetActiveMaterials()
# Modify roughness for each selected material
for material in selected_materials:
graph = GraphDescription.GetGraph(material,
nodeSpaceId=maxon.NodeSpaceIdentifiers.RedshiftMaterial)
GraphDescription.ApplyDescription(graph, {
"$query": {
"$type": "Standard Material"
},
"Reflection/Roughness": 1
})
c4d.EventAdd()
