Quick way to render just Alpha pass?

[TijuanaKez]

I just finished a queue a day and a half long and realised all my alphas are pure white

Is there way to go back and press out just the alphas without waiting for that whole queue again?

My scenes don't have any transparency or reflections.

Cheers

[aoktar]

Re-render all sequence at low max-samples value, even with directlighting or info channels kernel.

[TijuanaKez]

Re-render all sequence at low max-samples value, even with directlighting or info channels kernel.

OMG seems to obvious now, thanks!