here is a link posted to applying transparencies in bryce in the bryce forums, using the same technique bump maps can be applied. You can go with a multi-channel setup, by putting the bump marble in the second channel, and loading your map in their, or put it in the first channel, and follw the procedure for applying a transmap, but apply the bump instead. Don;t forget to set a bump strength :} http://www.renderosity.com/messages.ez?Form.ShowMessage=68021