How do them work?

[Daniele]

I'd like to know how the render passes work:
before I had a HDRI image (both for illumination and relections) with 1.0 multipiler, and I had 6 pass (interpolated reflections, high settings).

Now I have the same background image (1.5 multiplier for illumination, 0.5 for reflections), and I have 7 passes.

Why?

What does it mean?

I think that we should understand the method beside the rendering process, to be able to optimize the final image.

(P.S. I have 15000 frames... so you understand what I mean...)

[RErender]

This should help http://www.chaoticdimension.com/foru...ghlight=passes

[Daniele]

Thank-you RErender!