Hello,I am stuck in a problem!! I am not a specialist but I have been working with Auto Cad for a while.I have Auto Cad Architecture 2011 and I haven´t found solution to render a self made block items. I have been looking from everywhere in web, but to date, it seems hopeless to find the way.Hoping to receive constructive criticism...Thanks ahead to those who are willing to help!

Is it even possible to apply materials to a block?

I do not know!!That is what I am trying to find out.It doesn´t have to be a strict material. If I have a block, made from lines or polylines, am I able to add a color on the surface??

Yes, if you use the 3DFace command first.  If it is a 3D solid then use the Color Faces command in the Solids Editing panel.