
I found a sketch I did at the Hero's convention last year that I never finished. I did it as a warm up to a huge poster size painting I did for the art auction they do every year to raise money for the con. I fixed it up and rendered it out.
After I draw the image in pencil on my 15x20 gessoed illustration board I spray it with spray fixative to seal the pencils so they don't smudge. I think do the bulk of the paint with traditional oil paints. I use synthetic brushes to get a smoother look then you would get with bristle brushes. I usually lay in a brown sienna wash to get rid of all the white. After that dries I lay in my first layer of paint paying special attention to edges and my darks. It's important to get this right at the start as it's harder to change and fix things later on. I let that dry. A note to any oil painter reading this. I use a 50/50 terpanoid/pressed linseed oil medium with a few drops of cobalt dryer. My stuff usually dries overnight, something it might take an extra day depending on what colors I used as different colors have different drying times.
I should have taken some process shots during the painting but I didn't plan on posting this as a process. It just kind of turned out that way. After the painting I use a Nikon D80 camera to take digital photos of my painting. The best way to do this is outside on an overcast day but if that's not an option I've got a lighting setup in my studio. When ever I get some time I'll post an detailed "how to take pictures of my art" post.
After I get the image into photoshop I do quite a bit of tweaking. I saved all of Spidey's webbing on his costume because it's was easier to do digitally and I could play around with how I wanted to do his webbing. I also adjust my levels, contrast, and tweak the colors. After I got all that done I won't happy with how saturated the colors were or how the large yellow abstract spiders in the bottom corner competed with Spidey. The unfinished section at the top didn't turn out like the cool abstract background I was shooting for. I made a layer in photoshop, through some blue in there and changed the mode to "hue" This tied the background together much better. I also zoomed in for the final composition. There was just too much space surrounding spidey and I didn't like it.