Gap between compound clouds

[hhyyrylainen]

I just noticed that this is now a thing:

I have not changed the cloud math at all so this seems to be a graphical glitch. Maybe related to the recently added eye adaptation settings? A bit unlikely as this seems to happen in all of the patches (with different eye adaptation settings).

[hhyyrylainen]

I'm dreaming of finding the perfect graphics engine, this might get solved as collateral damage, so this isn't a high priority.

[hhyyrylainen]

So it turns out that this may have actually been an issue with Ogre as well...

[hhyyrylainen]

Might be related to #637
Might be caused by the edge pixels not being updated normally:

When filling in all the texture data with a fixed value, there is no gap, when using the normal spreading around logic there is a gap.