See the attached jpg.
Frames 1 - 13 render as the top image, the water has a nice blueish transparencey
frames 14-50 render as the bottom, faded and all blackish water.
What happened ?
Lights didn't change, scene didn't change in any way.
Any clues ??
If I render a single frame 14 from within Maya its fine (like frames 1-13)
Maya 2008, Realflow mesh, Area light with Portal light attached, FG and caustics.
Rendering at around 20mins a frame, I recon I've just wasted half day