[DustyPorViva]

Transparency should be 1, actually(since it's on a scale from 0-1), the fact that true worked is just because true = 1 :P

But yes, the problem before was you were using an opaque image with default transparency as well(since Graal ONLY does this with the interior of the window). Setting the transparency to 1 will disable Graal from making the image transparency and allow the image to do all the work.

I believe though with opaque set to true, you don't even need to set the transparency since that disables it.