How to get transparent iridescence using Cycles?

Question

I've succeeded getting iridescent with this Cycles node setup:

This did the job, however I need a transparent/clear iridescence like this

So I tried plugging the final output into a mix shader between Glass BDSF and transparent. However this still produces a black, barely iridescent material.

How can I get the results below from what I have? I don't want to use code but rather stay with nodes

Check out this thread on Blender Artists. I've jumped you to the Node-Based version: you can track back to the OSL if you like. — Robin Betts, Oct 16 '18 at 18:12

score 5 · Accepted Answer · answered Oct 16 '18 at 18:17

5

Don't Mix but Add your Shader to a Transparent BSDF. You may also want to multiply the Emission strength by some value less than 1: (in red my changes to Mentalist's version):

The result:

answered Oct 16 '18 at 18:17

Nicola Sap

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How to get transparent iridescence using Cycles?

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