The basic process is,
Find a reference photo,
Increase contrast/gamma, change to grey-scale.
Sketch out the black areas, dark grey, mid grey & light grey into blocks - colour them.
I set my canvas on photoshop for the reference to be the same size (A3/A4) - so it's easier to judge perspective when 1inch on my screen is the same as 1 inch on my paper .
Pending on the complexity of the picture I start out with very basic size sketch/perspective lines to get a feel for it, then work in segments (starting from the eyes/most complex area - then it's just a case of simply working from that point onwards with regular distance checks for key metrics (IE, I'll judge the eyes as been exactly 1/2 the way down from the reference picture & mark them out).
The only hard bid is the drawing really, the photo-shop prep is simple, as is the colouring - but as you get a hang of it you only really need to sketch the black (the rest of the tones come naturally).
For the picture above, i just drew the face a few times as a sketch until it matched, then the top of each shoulder as lines, along with 2 blocks for the legs & the chainsword & worked from that - the shading I did as I went along.
Find a reference photo,
Increase contrast/gamma, change to grey-scale.
Sketch out the black areas, dark grey, mid grey & light grey into blocks - colour them.
I set my canvas on photoshop for the reference to be the same size (A3/A4) - so it's easier to judge perspective when 1inch on my screen is the same as 1 inch on my paper .
Pending on the complexity of the picture I start out with very basic size sketch/perspective lines to get a feel for it, then work in segments (starting from the eyes/most complex area - then it's just a case of simply working from that point onwards with regular distance checks for key metrics (IE, I'll judge the eyes as been exactly 1/2 the way down from the reference picture & mark them out).
The only hard bid is the drawing really, the photo-shop prep is simple, as is the colouring - but as you get a hang of it you only really need to sketch the black (the rest of the tones come naturally).
For the picture above, i just drew the face a few times as a sketch until it matched, then the top of each shoulder as lines, along with 2 blocks for the legs & the chainsword & worked from that - the shading I did as I went along.