How to find unique pixel values in a costume

[cymplecy]

I was going to play around with image compression and thought about building list of unique colours

So I tried this (on standard Alonso costume)

but it doesn't seem to do anything

Anyone got any nice neat solutions?

[dardoro]

I'm afraid that pixels of the costume may be cached once, and the usual "quirks" with the modified list item may occur.
So a project reload or costume switch may solve your current problem. For the future, "id" may be helpful.

[cymplecy]

Thanks for that hint as to what was wrong

@dardoro

and the usual "quirks" with the modified list item may occur.

I didn't know this sort of thing could happen

(it worked when I saved/ file new and then reloaded my project)

I'll maybe remember to try id of if I encounter strange things in future

When it didn't work, I just assumed that uniques only worked on single columns