I was wondering if the low quality setting shouldn't be off only on smaller displays than the window size, since I think it will take more memory than high quality for nothing in that special case (images aren't resized at a lower res in this mode)
Low quality mode renders at whichever is the smallest size: the window size in project properties, or the display size. So resizing the window smaller is not slower in low quality mode, it still renders at the smaller size.
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Thanks for you quick awnser ^^