BlenderDNAScript

DNA Structure Generator in Blender (Python + bpy)

This script generates an editable 3D DNA double-helix model inside Blender, using the bpy Python API. It's designed to help animators, scientific illustrators, educators, and developers rapidly prototype DNA models with structural accuracy and customizable visuals.

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FEATURES

✅ Supports multiple DNA types:

• B-DNA (default, 3.4 Å rise, 20 Å diameter)
• A-DNA (2.3 Å rise, 26 Å diameter, right-handed)
• Z-DNA (3.7 Å rise, 18 Å diameter, left-handed)

✅ Clean base-pair geometry:

• Each base (A, T, G, C) represented by a color-coded cube
• Proper orientation toward the helix center
• Correct rotation, scale, and spacing based on DNA type

✅ Structured backbone:

• Cylindrical phosphate-sugar chain with smooth twist
• Connector spheres between segments to fill gaps

✅ Scene organization:

• All geometry is added to named Blender collections:
  • BasePairs
  • Backbone
    • Cylinders
    • JoinSpheres

✅ Material system:

• One shared Backbone material for cylinders and spheres
• Four unique materials: A, T, G, C
• A Floor plane is generated with all materials pre-assigned for easy editing

✅ Customizable inputs:

• DNA sequence (ATGCGT...)
• DNA type (A, B, Z)
• Materials editable by selecting the floor object

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USAGE

1. Open Blender
2. Paste the script into the Scripting editor
3. Set your desired DNA sequence and DNA_FORM at the top
4. Run the script
5. Select the “Floor” plane to access and tweak all materials

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NOTES

• The script is clean and modular for future extension
• Future versions may support:
  • Base pair bonds
  • 3D nucleotide meshes
  • Curve-guided strands
  • Unwinding/replication animations