Thanks, this looks great! I've been trying to use it with a UV map that's a layer of a 32bit EXR and getting frequent crashes. I have the ExtractoR plugin fetching the UV pass of the EXR, then PixMap on that. I also have the AE project settings set to 32bit, but have tried 16bit as well and no luck. The edges are also extremely pixelated even though I rendered out at 32bit.
Sorry about the issue... What version of After Effects and what Operating system are you running on for reference? I can look into recreating the issue myself and solving it!
Also! If you are on Windows, you're in luck!
I've done brand new total recreation of the PixMap plugin called B.Map that is GPU-Accelerated and is available for free now that you can try as well!