# 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.

- Skill: `ecnu-icalk/c4d-python-effector-for-random-clone-colors-in-redshift` (Agent Skill)
- Install (CLI): `npx skillmds@latest add ecnu-icalk/c4d-python-effector-for-random-clone-colors-in-redshift`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ecnu-icalk/c4d-python-effector-for-random-clone-colors-in-redshift/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: ECNU-ICALK (https://skillmd.com/u/ecnu-icalk)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/ecnu-icalk/c4d-python-effector-for-random-clone-colors-in-redshift

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# 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