replace color with transparent using ~PAL or similar?

[Gwledig]

Hi I'm trying to make a colour in an image/icon transparent, I can make the whole thing transparent with O~() but just want to replace a particular colour, which I can do for non-transparent colors with ~PAL() e.g. icons/jewelry_necklace_amber.png~PAL(0,0,0 > red)~O(0%)

The above replaces the black background of the icon with red, and applies a general opacity setting to the image, but does anyone know how to set the opacity of a particular colour?

gwledig

Moved to WML Workshop ― shadowm

[Sapient]

I don't think there's currently a way to do that with the existing ImagePathFunctions, sorry.
It might be a good feature request, though.

[Gwledig]

Thanks anyway. I get a reasonable outcome by replacing the background colour with the background colour of the area where the unit will appear (a kind of grey chasm background) and applying a partial opacity to the whole thing, this makes the unit look faded but it looks more like a regular units now, I am thinking in particular of non core unit artwork which can be used as multiplayer distributable unit art, not the greatest outcome but kindof works, e.g. "image.png~PAL(0,0,0 > 34, 56, 34)~O(70%)" this replaces the background black colour with the rgb values specified and partial opacity for the whole icon.

[beetlenaut]

Is there a reason you can't use an image editor to select and erase the color?

[Gwledig]

its for a multiplayer scenario and I'm working on the basis that a host can run a game & players can join without DL the scenario.