Since I was on the space mood I decided to make an alien sky.  And now one that is just freaky eyes and tendrils and stuff. The thought was a gas giant in the background.  So I fished up everyone's favorite windbag:  Jupiter.  I tried placing it in the sky. We had an issue though.  The black areas just render black when they ought to be blue (Sky glows over the blackness of space and everything else's shadows. Also we had the not-quite-512 image being downscaled to 256, when