@ferdinand
Alright, thank you for your reply.

@ferdinand
Thank you for your help.
I am using Cinema 4D 2025, and this issue exists in Cinema 4D versions 2023 through 2026.

@ferdinand
Hi, thanks for your reply.

c4d.MSG_UPDATE does not seem to work.
If I manually link the textures, they are correctly detected and displayed in the Project Asset Inspector. However, when importing them via Python, they are not detected.
Redshift and Arnold do not have this issue.
I hope you can help me figure out what might be wrong. Here is my code:

import c4d
import maxon

doc: c4d.documents.BaseDocument 


def main() -> None:
    c4d.CallCommand(1058751) # V-Ray Node Material

    mat = doc.GetFirstMaterial()

    urlTexRust = r"D:\RustPaint0291_M.jpg"  # image path
    
    idTextureNode: maxon.Id = maxon.Id("com.chaos.vray_node.texbitmap")
    brdfMaterial: maxon.Id = maxon.Id("com.chaos.vray_node.brdfvraymtl")

    nodespaceId = c4d.GetActiveNodeSpaceId()
    nimbusRef = mat.GetNimbusRef(nodespaceId)
    if not nimbusRef:
        return
    
    graph = nimbusRef.GetGraph()
    if not graph:
        raise RuntimeError("Could not add graph to material.")
        return

    result: list[maxon.GraphNode] = []
    maxon.GraphModelHelper.FindNodesByAssetId(graph, brdfMaterial, True, result)
    if len(result) < 1:
        raise RuntimeError("Could not find Mat node in material.")
    matNode: maxon.GraphNode = result[0]
        
    with graph.BeginTransaction() as transaction:

        rustTexNode: maxon.GraphNode = graph.AddChild(maxon.Id(), idTextureNode)
        pathRustPort: maxon.GraphNode = rustTexNode.GetInputs().FindChild(
        "com.chaos.vray_node.texbitmap.file")

        pathRustPort.SetPortValue(urlTexRust)

        rustTexColorOutPort: maxon.GraphNode = rustTexNode.GetOutputs().FindChild(
        "com.chaos.vray_node.texbitmap.output.default")

        brdfBaseColorInPort: maxon.GraphNode = matNode.GetInputs().FindChild(
        "com.chaos.vray_node.brdfvraymtl.diffuse")
        
        rustTexColorOutPort.Connect(brdfBaseColorInPort, modes=maxon.WIRE_MODE.NORMAL, reverse=False)
        

        transaction.Commit()

    c4d.EventAdd()
    
if __name__ == "__main__":
    main()

Hi,
I found an issue when creating renderer materials via Python in Cinema 4D.
Redshift materials created by Python can correctly display texture assets in the Project Asset Inspector.
However, V-Ray material textures are not detected by the Project Asset Inspector, even though the textures render correctly.
Is there any extra step required for V-Ray materials to register texture assets properly?

Thanks!

I’m working on a Cinema 4D + Octane Render project and need help modifying the "Import Type" button parameters of an ImageTexture node. Specifically, I want to automate or script the selection of different import types , but I can’t figure out how to access or modify this button’s settings through the Python.

I understand that Octane-related topics may not be suitable for this forum, but I've been struggling with this issue for a long time and really need help.

This is my code, but it's not working as expected.

import c4d

def main():
    mat = doc.GetActiveMaterial()

    shader = mat.GetFirstShader()

    ImportType = c4d.DescID(c4d.DescLevel(1139, c4d.DTYPE_BUTTON, 0))

    importValue = shader.GetParameter(ImportType, c4d.DESCFLAGS_GET_0)

    shader.SetParameter(ImportType, 2, c4d.DESCFLAGS_SET_0)
    c4d.EventAdd()

if __name__ == '__main__':
    main()

@i_mazlov I get it, thanks for your reply.

Hi everyone!
After using MergeDocument to import a file, I need to manually specify the texture paths in the Project Asset Inspector. Am I importing the files incorrectly, or is there an additional setting I need to configure?

import c4d

def main() -> None:
    doc = c4d.documents.GetActiveDocument()
    target_flie = r"D:\01\test.c4d"
    c4d.documents.MergeDocument(doc, target_flie, c4d.SCENEFILTER_OBJECTS | 
                                           c4d.SCENEFILTER_MATERIALS | 
                                           c4d.SCENEFILTER_MERGESCENE)
if __name__ == '__main__':
    main()