Experimenting with bump mapping techniques

The "Mountains" demo scene recently got improved by adding the Sibenik cathedral mesh from Ogre's samples. I was not satisfied with its look:

Sibenik cathedral, original material

The original material has black ambient and specular lights so the first change was to set ambient and specular to 1 1 1 so the light is not completely absorbed, but soon I realized it might be improved with some bump mapping.

Here's the result:

Sibenik cathedral with bump mapping

This is just the beginning, there are many bump mapping techniques out there, for example steep parallax mapping, so stay tuned for the news.