On 06.12.2004, at 19:44, Joao S. O. Bueno Calligaris wrote:

But nowadays, who seriously uses it?

I do. It's not very useful to mask an object in a low contrast environment but it works perfectly well for instance to mask an digitally photographed object against a somewhat distant background to only modify the background some more (reduce color intensity, blur, etc.) to strengthen the effect of the photo.

Servus,
      Daniel

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