clear colour from a shape#5081

there should be a function that clear colour from the shape so that shape can be used for colourless quest.

This is a copy of the suggestion here: https://shapez-2.nolt.io/1122

Tobr notes it’s a part of 1.0, but it’s unclear how it’s done. Best to bump that thread.

I think in 1.0 you should be able to mix white+white to get black and then mix white+black to get “unpaint” paint (but I haven’t reached the milestone for mixer myself yet).

Can confirm!