I’ve used VMware for years and had no problems. VirtualBox is a good free one I had used in the past.
Also, stitching multiple frames together seems to work really well. However, mammoth images seem to choke it and it does not progress past a certain point. But even with a low amount of color spaces (since a large amount choked it) the results are pretty darn good across a whole movie with very different locations.
Yes, there’s a limit to the size of the image it can handle ~8K. So, make sure to resize the frames to something like 360p before putting them together. This should not affect the color matching result.