Dave Disagrees
16 x 20
Oil on Canvas Panel
I'm a draftsman and engineer by trade - the photo below (from which I based my painting) is analyzed and dimensioned.
This method allows me to translate the photo to canvas, at any scale, and without distortion. As you can see, I also used it for some color matching.
Have to be carful with photos as the exposure greatly affects the color and lighting (obviously).
The back of the framed canvas
For paintings like this, I use canvas panel (canvas board) rather than stretched canvas, because it allows me to do my precision drafting,
and my sharp pencils and instruments won't make any holes.