I am writing a program in which the tiledImage/renderedImage is cmyk and i need to export it as tiff file, but i got it as a white image when i use imageio, and no response when i use jai.create(filestore), so i convert it into rgb using bufferedimage and i got success, but it is too slow, i wanna try the jai to convert the colorspace, but it always showed incompatible colormodel error. does anyone know how to solve this problem? no matter the way of write cmyk tif or convert to rgb using jai, thanks!!