I kind of like this idea.  How exactly would the pattern specity the
trnasparency?  Would you use a transparency_map (or would a color_map or
pigment_map be sufficient)?  This might be adding overkill to the system
and may just confuse people, but I still think it might be a good idea.

One thing to note: You can already create the filter/transmit versions of
this by using a pigment_map.

-Nathan

Chris Huff wrote:
> 
> I have been thinking about a new way of specifying transparence, rgbft
> seems too limiting.
> The new way would look like this:
> 
> New pattern: solid OFFSET//where OFFSET is the point on the color map(or
> whatever map)
> 
> transparence {//this would either go under texture or pigment, probably
> the latter
>     multiplicative PATTERN
>     additive PATTERN
>     subractive PATTERN
>     filter PATTERN
>     transmit PATTERN
> 
>     pigment {}//an optional pigment, if present, this is used for
> transparence calculations
> }
> 
> It would allow a separate pigment for the transparence calculations, and
> would allow one to have an object of one color filter light like an
> object of another color(I believe there are some real-world substances
> which actually do this).
> It would be very useful in layered textures, and would make some very
> interesting surrealistic scenes possible. Also, it might make good
> clouds when used with the layered objects approach.

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