Great TDW
that work
another thing to see it's to create the "bump" material "folder" ..
we can't create a material type : No texture+map with just an additional bumpmap ... (as is usual in materials)
eg :
Material #1 (material+map (add : Diffuse,Self illumination,Bump))
-> Diffuse #1 (map+texture) OK
-> Self illumination #1 (map+texture) OK
-> Material "Folder" Bump #1 (no texture with map (just additional bumpmap) that is this one we can't create ... and this "folder" material is to link the bump #1 (map+texture)