Save on Thermo/Add infinite detail
bare in mind that the quality isn't perfect but used in the right way it can make your levels look stupidly detailed without using hardly any thermo! interested?
make anything you want: a full scene, an intricate set piece. fill the thermo if you want and then take a picture of it. take that picture and place it on a sticker panel. set the sticker panel to the brightness you want and place it wherever you want. you can make complex backdrops to put into one of the many 50 layers, you can make a back wall for your spooky levels. i've found that if you make it slightly smaller you get a clearer result. this is so diverse. try using it with Comphermc's infinite level trick!!!
to keep the parallax perspective put the sticker panel pic on a real material such as cardboard.
if you are really patient you can draw around individual creations with the slice and dice and then add detail to your backdrops or walls bit by bit.
edit: i've found that you can cut out better by using another sticker panel in which ever shape is closest to whatever edge you want to cut out of course
edit: I've done some more experimenting with this and it's not advisable to try and capture all of what you've designed at once because it loses quality. put your grid on and capture it in segments. just use the slice and dice tool here. for less symmetrical material designs use markers along the top and down one side (set at a distance from the main design to make it easy to capture the pic) and use these as markers for your slice and dice tool
this does mean using more thermo in the long run, but you can still use as many assets as possible and take a tiny bit of the thermo up compared to if you really used them. i found that a large grid of about 4 by 4 is fine for the backgrounds but a large grid of 2 by 2 or possibly 3 by 3 for the foregrounds. you can go larger, that''s up to you. try not to up-scale anything it loses detail. downscaling is fine though providing you don't go stupidly tiny. it's also handy for altering the size of some material designs such as stone for stone walls.