Pipe color from fluid color

[darkfrei]

Hi devs!

Is it possible to use barelling colors as color for pipe's mask? It's nice to see all fluid types without alt mode.

In the real life pipes with water are blue, pipes with gas are yellow etc.
https://www.google.com/search?q=pipe+co ... d&tbm=isch

[foamy]

In theory that's what the windows are for, but straight non-junction aboveground pipe pieces are a rare beastie indeed. I like the idea of just colouring them given the no-fluid-mixing schema we have now.