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1- Transparency is very tricky and doesn't work properly. The only way that I found is using the mix and null materials. Setting an amount of transparency it works, but when I try to use a transparency map for the amount nothing happens.

If transparency doesn't work in Lux, who the hell did they do it in Blender????

Tip: Forget about the tricks you learned for Poser to get "realistic glas". Read the Lux faq and forum. Have a look at the predefined Lux materials.

It's not easy. But it is possible.

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