Just thought it would be good to have more integer scaling options, crop, scale inner/outer etc. I don't see why it has to be letterbox only.
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A "crop" integer scaling would be weird, since crop doesn't scale
You can do integer scaling yourself by using Crop (no automatic scaling), then do it with events like I did Here (can be improved a lot I think), but could be nice, but not many games will be able to use integer scaling other than letterbox I think.