Hello everyone,
I have a model of some medieval house exported from max with several materials/textures.
Each texture is about size 512x512.
How can I add normal mapping to the model?
As far as I've managed to understand this shader ->

http://www.opserver.de/wiki/index.php/Normalmapping_Shader_With_full_specmap_support

allows to have a mesh with 3 textures: 1 diffuse 1 normal map 1 specular. And that texture itself has everything in it.

What about my model that has a separate roof texture from wall texture? Am I forced to create a huge texture (avoiding loss of detail) and throw every texture in there, and than re-unwrap everything on max?

Or is there a coding solution to this?