Access Node Material Path Redshift 2026

[randmcnally]

hello.
working on a project where I have 8x materials with 11 texture nodes on a shader switch for a total of 88 textures that are mapped to the indexid of a clone object via a userdata node

I have been attempting to script this via python where I can swap the textures based on the material name, then within each texture I mape 1-11 on clone material 01, 12-22 on clone material 02 but I am running into troubles accessing the 2026.1 command to access the Redshift Texture path. I think I have spent more time on this than it would have taken to do this manually, but I am interested in fixiing this. I have seem previous posts on the forum related to this, but in 2025 things seem to have changed and I am not sure where the "Path" is located on a Redshift material and how I can link that path to a user generated name on the material.

essentially I am trying to get python to see "cloner_01" material, then within that add textures 01-11 to the textures within it based on the user generated name on the texture node, 01-11. then for "cloner_02" material add textures 12-22 into, and so on and so forth until "cloner_08" 78-88. I was able to do this failry easily on a displacer deformer to swap the shader per clone there. but I am having trouble access Redshift's Path.

could I get a few hints as to where I need to be looking to do this, or maybe there is a better logic? thanks.

[randmcnally]

hi there, I actually did sort this out in a very round about way with some "vibe coding". this was for a mapp creation project I am working where I am displaying various eras of map onto 20km grids (so as not to kill the viewport functionality). have a look at the below and let me know if this is a solid approach or if there was a better way:

import c4d
import maxon

def main():
    era = "INSERT_YOUR_ERA_HERE"
    basePath = "INSERT_YOUR_PATH_HERE"
    prefix = f"map_{era}_tile_20k_"
    extension = ".tif"

    doc = c4d.documents.GetActiveDocument()
    if doc is None:
        return

    nodeSpaceId = maxon.Id("com.redshift3d.redshift4c4d.class.nodespace")
    textureNodeId = maxon.Id("com.redshift3d.redshift4c4d.nodes.core.texturesampler")

    for mat_index in range(1, 9):
        mat_name = f"column_{mat_index:02d}"
        mat = doc.SearchMaterial(mat_name)
        if not mat:
            print(f"Material {mat_name} not found.")
            continue

        nodeMat = mat.GetNodeMaterialReference()
        if nodeMat is None:
            print(f"{mat_name} is not a node material.")
            continue

        graph = nodeMat.GetGraph(nodeSpaceId)
        if graph.IsNullValue():
            print(f"No Redshift graph for {mat_name}.")
            continue

        textureNodes = []
        maxon.GraphModelHelper.FindNodesByAssetId(graph, textureNodeId, False, textureNodes)

        with graph.BeginTransaction() as transaction:
            for node in textureNodes:
                node_name = node.GetValue(maxon.NODE.BASE.NAME)
                if not node_name:
                    print(f"Unnamed node in {mat_name}, skipping.")
                    continue
                node_name = str(node_name)

                try:
                    local_index = int(node_name)
                except:
                    print(f"Non-numeric node name '{node_name}' in {mat_name}, skipping.")
                    continue

                global_index = (mat_index - 1) * 11 + local_index
                filename = f"{prefix}{global_index:03d}{extension}"
                full_path = basePath + filename

                tex0 = node.GetInputs().FindChild(
                    "com.redshift3d.redshift4c4d.nodes.core.texturesampler.tex0"
                )
                if tex0.IsNullValue():
                    print(f"No tex0 on node '{node_name}' in {mat_name}")
                    continue

                pathPort = tex0.FindChild("path")
                if pathPort.IsNullValue():
                    print(f"No path port on node '{node_name}' in {mat_name}")
                    continue

                pathPort.SetDefaultValue(maxon.Url(full_path))
                print(f"{mat_name} → Node '{node_name}' set to {full_path}")

            transaction.Commit()

    c4d.EventAdd()

if __name__ == "__main__":
    main()