Try to put a few normal maps on a model which has several textures in milkshape 3d created two groups and затекстурировал them). When loading put node->setMaterialType(EMT_PARALLAX_MAP_SOLID); and apply the second layer of a normal map node->setMaterialTexture(1, driver->getTexture(material_1));. The fact is that you need to put two normal map, one for the left part of the model where red brick, the second where the stonework. Now happens
Here's a screenshot of how it without normal maps looks like in the editor
What can you do? As the bust of the group? You can sample code?