So at $49 I thought, "Why not get Bryce 7Pro?" Iv'e been playing around and been caught three times by a bug in the materials lab. I'll decide to use an image as a material. I click on the little ball and get the window with the moon and leo to come up. I click on the next empty square and get the browse window to come up. I start navigating to my pictures and suddenly I hear the drive start to click. Immediately the browse window disappears though I haven't selected an image. I pop back to the materials window but it's frozen like it's still waiting for input. I minimize the bryce window hoping to find the browse window hiding. I try to close the materials window and either nothing happens or windows eventually pops up saying the following: Bryce7 is unresponsive. Do you want to close the program or wait for the window to respond?

Heck no! stupid me hasn't saved in four hours. I added fifteen things. I want to save this puppy.

So bring up Windows task manager. In the Processes tab find the image name dwm.exe and end this process. The materials window in Bryce responds again. I get back to the main window and save under a new name promptly.
 
I can go back into the materials window and add the image texture. Sometimes it works and sometimes it freezes again. The longer I leave the browse window open the greater the chance it will lock up.