Today is my farming day but I will look into this when I return. I think I added a neutral grey (RGB 128) behind the slides because when cross fading between slides it appeared darker than either slide. I think I can fix the problems.
Thanks,
Tom
Update: I now keep slide 2 at 100% opacity to fix the cross fade. I think this solves the problem and how the PTE dissolve transition works. I have not found the problem with rain transitions so far.
Ripple4.pteeff