Rendered water appears as Alpha

[Wingman3d]

I've been working on a scene with water.
Suddenly the water renders as alpha. I can see it in the frame buffer, but when i click on show alpha, it appears as black. And also in Aftereffects it shows only alpha.
It appears to be where the water isn't reflecting anything. Where there are reflections, there isnt alpha.
When i go back through my versions it renders fine, so i must have changed something without knowing.
Any ideas?

[vlado]

It's a bit hard to understand what's going on without the scene. It would be helpful if you can post here or else email a part of the scene to vraymaya@chaosgroup.com

Best regards,
Vlado

[Wingman3d]

It's a bit hard to understand what's going on without the scene. It would be helpful if you can post here or else email a part of the scene to vraymaya@chaosgroup.com

Best regards,
Vlado

Found the mistake! I had by accident set Affect channels to "all channels" under reflections.
I usually do that on refractions, but i see now that doing that under reflections gives a sort of mask for the reflections.

[vlado]

Ah, ok then.

Best regards,
Vlado