thank you so much for the responses! Most of the brunt work is done in xara. There I set up all the perspective, thank God for the snap to objects tool! But Each was averaging around 15"x18" 300dpi. I usually used around 40" of 'gray space' so I could fit the vanishing points on there. I usually did it in color or gray hues. But when I exported it I gave it all a white fill with 1pt thick black outlines I believe. Brought it into PS and gave it a layer property so the white would be transparant and colored in the lines in different layers using the magic wand tool. But the coloring's a little easier for me, more natural. I taught myself a lot about perspective thought along the way and it helped me a lot.

3D I lack the software and computer power! But I will definitely be getting into it sometime in my future!
thanks again