Shiny roads

[alex25]

i tried to use the specular maps that came with the original rFactor version of the interlagos track and the results were a bit underwhelming: http://caliban.lbl.gov/vdrift/interlagos-specular.jpg. the specular map i used can be found at http://caliban.lbl.gov/vdrift/rroad.dds-misc1.png (and then i copied this texture for the different road textures used). i guess we process specular maps differently than rFactor does. it would be nice to figure out how to transform an rFactor specular map to vdrift or maybe do it the same way in vdrift.

the other thing is a lot of different textures use the same specular map, so in the long term it would make sense to probably extend surfaces.txt to add support for specular maps as well so we can map the texture to the specular map instead of having multiple copies of the same texture under different names.

rFactor also has support for bumpmaps, not sure if vdrift does.

--alex--