Ok, I've been battling with The GIMP's frustrating helpfulness all morning and got nowhere, so I need some help now :
I'm trying to create a theme which uses a progress bar like this :
The little green circles are the only bit of the progress bar I want drawn - so I need to make the background transparent. The trouble with that is that when I render them on the background color that RB uses for transparency, I end up with an image like this :
And that ends up displaying similarly to this :
The problem here is the GIMP is trying to help me and anti-alias my pasted green circles onto the magenta background - but then I end up with some pixels which are mostly magenta, but not quite the one RB uses for transparency, so they end up being drawn like on the WPS. I've tried pasting the green circles over a white layer on top of the magenta layer so the anti-aliasing uses the white to mix with the green, and then removing the white background (or just switching it off prior to save). However as soon as I do this, The GIMP redoes the anti-aliasing with the magenta background again.
Now in case anyone is wondering the background my progress bar is going to be drawn over is *mostly* white, but not quite - otherwise I'd just do this with a solid background and not give myself all this pain.
So now - does anyone know The GIMP's foibles well enough to help me achieve what I'm after here ?