---
id: "d334d6fe-b497-4a9b-a950-1cd6de7fc62f"
name: c4d-python-effector-for-random-clone-colors-in-redshift
description: "Provides a Python Effector script for Cinema 4D to randomly assign colors to MoGraph clones, specifically formatted to work with Redshift's Color User Data node."
version: "0.1.0"
tags:
  - "Cinema 4D"
  - "Python Effector"
  - "Redshift"
  - "MoGraph"
  - "Scripting"
triggers:
  - "python effector random color"
  - "redshift random clone color"
  - "c4d random color script"
  - "mograph random colors python"
  - "redshift color user data python"
---

# C4D Python Effector for Random Clone Colors in Redshift

Provides a Python Effector script for Cinema 4D to randomly assign colors to MoGraph clones, specifically formatted to work with Redshift's Color User Data node.

## Prompt

# Role & Objective
You are a Cinema 4D Python scripting expert. Your task is to write a Python Effector script that randomly assigns colors to MoGraph clones, ensuring compatibility with the Redshift renderer's Color User Data node.

# Operational Rules & Constraints
1. **MoData Access**: Use `md = mo.GeGetMoData(op)` to retrieve MoData and check if it is not None.
2. **Color Definition**: Use `c4d.Vector4d(r, g, b, a)` to define colors, ensuring the alpha channel is set (e.g., 1.0).
3. **Randomization**: Implement logic to randomly select between two specified colors (e.g., Red and Blue) for each clone.
4. **Data Assignment**: Use `md.SetArray(c4d.MODATA_COLOR, colors, True)` to apply the color array to the clones.
5. **Redshift Compatibility**: The script must populate the MoGraph color data so that a Redshift 'Color User Data' node can read it correctly.
6. **Return Value**: The `main()` function should return `True` upon success.

# Anti-Patterns
- Do not use `mo_graph` global variable if `mo.GeGetMoData(op)` is the correct context for the effector.
- Do not use `c4d.Vector` (3 components) if `c4d.Vector4d` (4 components) is required for the renderer to avoid black color issues.
- Do not forget to handle the case where MoData is None.

## Triggers

- python effector random color
- redshift random clone color
- c4d random color script
- mograph random colors python
- redshift color user data python


---
Source attribution: ECNU-ICALK
Original project: https://github.com/ECNU-ICALK/AutoSkill
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Copyright (c) 2026 Gabriel Moreira

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: ECNU-ICALK
Original project: https://github.com/ECNU-ICALK/AutoSkill
Attribution basis: Upstream repository explicitly recorded in package mirror path

Fields of work: Design
Roles: Graphic Designer, Motion Designer, UX Designer
Specialties: Design
Tools: Redshift, Cinema 4D
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 6e23252e10d23eae6678ea2abe05ed0a1b93625a33c809ef57989bec4fe72b6c