I want to create procedural star moss stems:
I though a good approach would be to:
- Make STEM (Bezier curve), taper to tip (achieved)
- Create LEAVES from curves (achieved)
- Instance LEAVES around the STEM in phyllotactic spiral (partially achieved)
- Control scale of LEAVES depending on position on STEM (EDIT: achieved)
- Instance groups of STEM + LEAVES on curve circles to create clumps of moss
This is what I have so far for creating the stem with some leaves around it:
What I can’t figure out is:
How to control the rotation of instances around the stem so that they form a spiral?
How to scale instances based on their (Z axis) position along the stem? [EDIT - achieved]
If I instance the stem on another object (e.g. curve circle to create a clump), how would I introduce some random flex to the stems?
At the tip of the stem, leaves would need to have a different angle (point up more). Not considered this yet, but would probably tackle this by instancing these separately on the stem so they could be controlled independently.
I figured out how to control the size of instances along the stem with a capture attribute node and a float curve, as here:
EDIT 2: I realised there is a twist node in the ETK and this achieves close to a phyllotactic twist: