In playing around with image.ss, I've run into the following problem: the center of an image does not appear to be rotation invariant. Thus, if you use place-image/align in order to place a triangle, say, that you then rotate continuously, you will see the triangle wobble as its effective center moves around.
Is there any way around this? I tried using pinholes, but pinholes seem to require that all images involved have pinholes, which is not quite what I'm going for. What I really want to do is to declare a stable center for an image, but I can't quite figure out how to do that. y
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