I have a series of panoramas I have put together into a tour. I would like to use a logo for the nadir. However, I am not really clear as to if there is a good way to calculate the size of the image that I will need to patch the nadir. Is there a good way to do this? Or, do I have to experiment with semi-random sizes until I find a size that works? (I'd rather not go too big otherwise it is slow to load or too small where it becomes pixelated when enlarged.)
Perhaps export the cube faces of one pano then you should be able to determine the size required.