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Mike, for your information. The famous magic wand to remove all of one color would indeed be something good BUT would that want be able to remove all of the same color in all subimages of a sprite? I think the information submitted here is that BEFORE, there was a possibility, built-in GMS that permitted us to remove the background color of a sprite, animated or not. Now, as you suggest, that possibility dissapeared taking out something pretty rudimental and overused during the passed years with YYG. I do think the remove background function should have stayed here BUT, it you are looking into removing a color using something else, please take into consideration to be able to do this with more than one image in a sprite or else the diting will be pretty long and tiresome.
Sorting sprite animations across one unique single file (and with solid BG color) is a common practice among pixel artists. The "Create from strip" options is absolutely fantastic in this case, and "Remove background" was very useful as well. This feature will only bring benefits for fast import of indexed images.
I would recommend that you let us select the color to be removed simply by clicking on one place of the image preview you show us during the import phase, as seen in this mockup:
But, in fact, you could let us remove the background color in any other dialog for importing images into the program, not only on "Create from strip". Please, make our life easier.
@Dani You just managed to sum up exactly what I was thinking for a good way to allow the background to be removed during import. Allowing the user to select the colour does away with that old way of "the lower left pixel to be the colour to remove" that @Mike mentioned.
Hey guys! Does this option still exist?:
Images > Erase a Color... Shift + Ctrl + E
In GMS 1.x it can be applied to a single sub-image or to all at once. I find this more useful than simply removing the left hand top corner.
I don't mind if it's in a separate window that's not included in the import options.
@Mikethat sounds like it could be tedious but I'm probably not understanding the context.