PS produced by the mapping saved as the default PSD format can be, such as the above picture, mapping the background is done with PSD format files, this format file image clarity, but the file is larger.
The same picture size, if the picture clarity requirements in general, but the need to file as small as possible, you can use JPG, PNG, BMP and other formats.
ps produced by the mapping can also be saved as tif, tga and other formats imported into the max software.