There’s a very interesting alternative method to create the iris, based on UV Map and textures
These are mine:
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This is nice!
However I found another much faster method for straighten the “Iris” UVs.
With “Follow Active Quads” you just have to straighten one quad, select it and unwrap again using the option. No need to pin anything.
As you can see here: Procedural Iris by me!
Love this!!! Great work…