graphics/entity/ulric-corral/ulric-corral-base.png is 17MB

using ImageMagick to perform what should be a noop on it, mogrify -resize 100% ulric-corral-base.png, the result is what seems to be a pixel-perfect identical image only 2MB in size.

This is not the only example. ulric-corral-base-mask.png shrinks from 17MB* to 240kB, and at least a few other big images in other directories also shrink similarly. I think something is wrong with some part of your graphics export workflow.

* the fact that both base and base-mask are almost exactly the same size (~500 byte difference) despite being grossly different in terms of graphical content suggests that perhaps the same large block of metadata is being left in both of them, perhaps an artifact of the layering or processing or export tools you use?