Creating Custom Modeling Tools with your AI Assistant

Learn how to use an AI assistant to help with 3D modeling and tool creation in Maxon Cinema 4D so you can build your own library with custom assets tailored to your workflows.

In this Cinema 4D tutorial, Cinema 4D Master Trainer Jonas Pilz demonstrates how AI assistants like Claude or ChatGPT can assist with a practical modeling task: creating a knurled surface on selected polygons of a guitar knob. Instead of stopping with the initial modeling result, the workflow is then turned into a reusable Cinema 4D generator that can be used on other objects in future projects and even shared with a whole team.

The tutorial shows how an AI assistant can work iteratively with Cinema 4D - creating a first solution, responding to feedback, fixing update issues, supporting multiple child objects, adding user controls, generating an icon, and ultimately saving the finished tool as a reusable asset in the Cinema 4D Asset Browser.

You’ll see how to:
• Create a knurled surface on selected polygons in Cinema 4D
• Use Claude as an AI assistant for Cinema 4D workflows
• Turn a one-off modeling operation into a reusable Python Generator
• Add controls for subdivisions, depth, pattern, inversion, and border handling
• Use polygon selections to control where the knurl effect is applied
• Debug and refine AI-generated Cinema 4D tools through natural-language prompts
• Support multiple child objects inside a custom generator
• Create and assign a custom Cinema 4D-style icon
• Save the finished generator to the Cinema 4D Asset Browser
• Reuse the asset in other Cinema 4D scenes and share it with a team through a shared asset database

The final result is a reusable Knurl Generator for Cinema 4D that applies procedural knurling to polygon selections across different objects.

This workflow demonstrates a broader way of working with AI in Cinema 4D: rather than only asking AI for instructions or code snippets, you can use an AI assistant to help build, test, debug, and package custom tools for real production workflows.

Topics covered:
Cinema 4D AI workflow, AI-assisted 3D modeling, Claude and Cinema 4D, Cinema 4D Python Generator, procedural modeling, knurling, custom Cinema 4D tools, Cinema 4D Asset Browser, polygon selections, procedural assets, AI coding for 3D artists, and reusable Cinema 4D generators.


Instructions used in this tutorial:

1st INSTRUCTION (create knurled surface):
I'm creating a knob in C4D. Please make it so that on the selected knob the selected polygons are knurled.
In case additional files are being created, save them in the same location as the current file.


2nd INSTRUCTION (make procedural knurl asset):
Please create a reusable modifier from this workflow.


3rd INSTRUCTION (corrections part 1):
There is an update issue: The knob is invisible when the knurl is deactivated. Fix it.
Make it so that it works with the Taper being a child of the Knob.


4th INSTRUCTION (corrections part 2):
Make it so that the generator supports multiple child objects.


5th INSTRUCTION (corrections part 3):
Make it so that it's working on all child objects.


6th INSTRUCTION (create icon and add asset to database):
Amazing! Now create an abstract icon for the Knurl generator and assign it. Maybe a grey square with a green diamond shape on top. Stick to C4D icon colors.
Save the Knurl generator to the database.