The stitching always got me too until I started using a grid method. Draw a light grid over your reference and match it on your paper.
Also, for glossy parts, leave more white space than you think—glare is brighter than it seems. Maybe try a blending stump for smoother shading?
Also, for glossy parts, leave more white space than you think—glare is brighter than it seems. Maybe try a blending stump for smoother shading?
