Many people keep asking if anyone got the custom mentalray bump nodes to work. Because many people think custom mentalray bump nodes are waaay better than the maya's default bump2d nodes. Let's have a look. First off we need to get the mr bump shading-network actually working. Here's a hypershade snapshot of the raw bump-vector generating part:

The connections are as follows: mib_texture_vector2.outValue> mib_texture_remap2.input mib_bump_basis2.u> mib_bump_map1.u mib_bump_basis2.v> mib_bump_map1.v mib_texture_remap2.outValue> mib_bump_map1.coord mentalrayTexture2.message> mib_bump_map1.tex Whereas the mentalray Texture is being automatically created and connected when clicking on the checker button next to 'tex' in the mib_bump_map node.