Not with DBClassic, but with DBPro, you can make your object as a memblock, which is really just a case of adding each triangle in sequence then converting into a mesh - which can be added as a limb or created as a new object.
If you have DBPro, I suggest taking a look at Kevils excellent memblock matrice demo, I've managed to make a really cool little engine from it with trees and bushes being created in much the same way as the ground tiles - and a layered landscape, which allows flat sided cliffs and ramps (I can even make half-pipes). Texturing may be a problem, but it is quite easy to set the UV coordinates, just tricky to calculate what the coords should be. Obviously texturing a landscape is far easier than texturing a complex mesh. But - you can do some cool stuff like colour the vertices and set the normals, stuff that is not really that accessible in modelling software.
EDIT:
Forgot to say, when you create a triangle, it is a single object, so you'd have to create a triangle then convert to a mesh, then add as a limb to a main object.
Van-B
My cats breath smells of cat food.
