Coloring: Holon Sequence - Custom Gradient

[Kaspar]

Ok, I checked it and the gradient comes from a combination of the vertical angle, true depth and iridescence.

Ok., thank you. And a very last question: I've posted a pic using depth window to making shadows, and as you can see there is a ghost shadow from rendering before this (using depth window too). What can I do to reset all the rest before I render a new pic? I've used the "Render new" button, but it seems that a rest last rendering can survive that. Have found this sometimes before too, but maybe it's my mistake?

Regards Kaspar