Attached is a patch. I have managed to get it working fairly well. My image is 4239 X 3241 – huge!
I can re-size the Jit.pwindow to about 755 X 615 and it works quite well.
But I want it smaller
One workaround I found was to open the original image in preview or some other image viewer then just command (-ve)to make the image smaller then just take a screen shot of it as a smaller image [shift command 4]
then import this into max
its still a bit blurry but this is to be expected when downsizing.