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Thank you very much for your help, Treebeard and Johnes81.
I don't quite understand what you mean by the lighting problem.
Maybe to the iridescence?
Let's see if it's okay, or tell me what the problem is.
Greetings.
I haven't seen Piluca in years, I'll try to connect.

Diptero3 by Alfredo M. Rubio, en Flickr