Hello Toni,

> Hi Matthias,
>
> so I'll also have to take care of the depth buffer I guess
> (first pass writes to z, for the others I switch z-comparison
> to something like ">=" (?)

so it its. Or simply disable z-buffering for the second material. The 
blending (and z-buffering) is totally up to you ;-)

Regards

Matthias

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