I'm not familiar with the Marlin Studios product. If what you're looking for is to have images with alpha channel, its pretty straightforward from Photoshop or Imageready. Create your alpha channel to define transparency, and save the image with alpha out as a TIFF. (Be sure to flatten your image before saving) Tiff can store a transparency channel (so can some other formats, like PNG, but Tiff is more likely to be read correctly by the target application) I haven't used Bryce in a while, so I can't remember if it respected the alpha from a Tiff-- i think it did. Even if you've got an application that doesn't read the Tiff alpha, you can save the grayscale alpha channel as its own image (EG MyPicture.jpg is the color data; MyPictureAlpha.jpg is the transparency data) . . . almost all 3D applications will let you apply these two and more to make a clipped texture.