Here's an old inked and partially-colored drawing of a space craft I was designing for some comic which I can't recall. I never completed it because I wasn't happy with the textures I was getting from the colored pencils (I wasn't using Prismacolors yet and still hadn't nailed down the various techniques I would learn over the following years). As you might be able to tell from the scan, the black ink has faded and shifted to a more greyish-yellow tint.

I never used any sort of perspective guidelines or even rulers when I drew this picture. Heck, I think most of my earlier stuff was never concerned with those "guides". Granted, my hands are not as stable and smooth as they were back in high school, so rulers come in handy nowadays!

I have another recent rough sketch, based on this older design, for a ship I will be using in an upcoming Caterwaul story. See, it pays to hang on to some of those old drawings!