On 23-7-2017 0:27, Kenneth wrote:
> "omniverse" <omn### [at] charternet> wrote:
>>
>> Main thing I was seeing was the cleanliness of the outer tops, especially
>> compared to the interior of roofs.
>>
> 
> Fixed!
> 
> I also added some 'rain stains' under the windows, of the two most prominent
> buildings in the attached image.
> 
> Currently, the buildings look too 'clean'. I'd *like* to add some overall subtle
> stains to the structural faces of the buildings-- but not to the glass windows.
> And that presents a practical problem, of how to go about it (due to the TILED
> nature of the window images.) Simply painting stains onto particular areas of
> the image tiles would end up looking too 'regular' and repetitive. The stains
> need to be larger and more random (like overlaying a subtle bump pigment onto
> the entire building face-- minus windows!)
> 
> Hmm, I need to give this some thought...
> 
Too exclude the window areas you would need a (for instance) black/white 
image alongside each tile and use the eval_pigment() test to exclude the 
window areas.

-- 
Thomas

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