Modeling your own buildings and objects.

[Jimmylh]

I would like to make custom buildings, factories, objects etc. My guess is that you need a 3d modeling program and a program to skin it and then convert the 4 different images into a .dds file. Any recomendations?

[gczobel]

An someone can explain what is the relation between nif, kf, and kfm files?
Or a good tutorial?

Thanks in advance!