On Monday 02 May 2011 10:53:40 Jonathan Tanant wrote:
> Hello,
> 
> Would it be possible to add some details using a second stage texturing in
> an effect file ? (Should add some eye-crisp on close-up views to the
> runway textures (takeoffs and landings), and possibly on grass or others
> materials too)
> 
> Tried to add a second texture unit in "modulate" mode in
> terrain-default.eff but doesn't seems to work in modulate mode... Tried in
> "add" mode, result is burnt to white.
> 
> But maybe I do this the wrong way...
> Any ideas ?
> 
> Some questions :
> Are the nodes in effects files documented anywhere : I've read the
> Readme.effects file, but doesn't give much details about the
> <environment><mode> node... Is there a way to specify that the UV
> coordinates have to be multiplicated by some float constant by the shader
> ? For a details texture (asphalt ground), UVs should be multiplicated by
> something like 40 (and warped).
> 
> Thanks,
> 
> Jonathan.
> FlightGear french user.
> FlightGear rocks !!!!! :-)

This can be achieved with custom mipmaps embedded in .dds textures. I've done 
some tests in this area and it's working as expected. You can test with this 
file: http://ompldr.org/vOGlvYw , as a rock (limestone) texture.

HTH
Emilian.

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