Aloha e na po`e... SO question:
I have a simple sprite based particle system emitting particlesa along the ground. I have a separate premulted image projected on a card that is also in the scene. I am using the projected image to render with the particles, so that through the camera some of the particles pass behind the image and in front of the image. However, i would like to be able to separate the projected image from the particles after ti's been rendered through the scan line renderer so that I can grade each piece of the image separately. But the alpha for both the particles AND the projected premulted image are passed through together. How would one be able to control which alpha came through/rendered. I would like to be alble to grade the particles seprately from the projected image. Any ideas?
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