Hey Mike

With problem one, it looks as if the lines are not drawn very fine and have jagged edges I'm not too sure but have you checked your render globals try anti-aliasing on production quality this may fix the problem or at least help if you do notice an improvement start upping the aliasing value although production quality should be fine.

If this doesn't work at least post some specific information on your render globals like picture size and quality. Also there is a 1 to 1 scale button in the render view try pressing that sometimes the picture isn't presented in correct proportions and that button sets it back to 1 although your problem doesn't seem to be noticable that one.

Problem two. Okay you want lots of windows some lit up some not. Using images. One way to do it would be to feed both images color and incandescentce into your window color map and create rand() expression to generate either a 1 or 0 to switch between the two.

Basicly you have two images going into a color blender utility which you then put an expression on the Blender attribute.

right click on the Blender attribute and select Create new expression...

Make sure your choosing attribute blendColors1.blender

I haven't really used expressions much but it should look something like:

$select = rand(0,1)

if ($select>0.5)
blendColors1.blender = 1
else
blendColors1.blender = 0

You can adjust the $select>0.5 to add more or less images in your scene so this gives you reasonable control.

If you got any more probs just keepon postin.

Adam