SVGs with filters look grainy when scaled Currently we apply filters according to the abstract coordinate system of the graphic, NOT the device coordinate system (i.e. the final pixel coords when drawn to the screen). This can be *bad* for a couple reasons. 1. When you scale the resulting pixels, the result looks grainy. 2. You can end up rendering 6 billion pixels and only using 1% of that if that part of the image is scaled down. A couple ways to solve this: 1. Just figure out what the final CTM for the item/group in question and render only the necessary number of pixels. 2. (Better!) *delay* compositing of the result image. Instead pass the CIImage back to the parent container (the one calling draw()) and let it do the compositing (or apply it's own filters using that CIImage as an input). When you finally have to do the compositing, figure out the absolute CTM, etc. I guess 2. is really just an optimized version of 1. In either case, this will need to be solved.