In contrast to my past mechanical drawings, I am using organic matter for my tutorial. To be honest, I sort of did this to prop for my dragon -- doubling both at the same time when I realized I ought to do something for people needing help with the wings. Then I realized my dragon was hopeless and could only be fixed with a LOT of surgery. In short, I am going to have to make another dragon to make an adequate Instructable.
I will be doing mammal and bird wings later. Reptilian wings are just one of my favorites.
Step 1: Outline and Sketch
Draw the basic outline of your wing, its form an L with an M branching from its head. This M should have elbows on each leg. Fill in the rest of the outline with lines running along the opposite of the scaffolding you drew, placing a round edge at the ends of the wing tips. Where you meet the elbows place a bit of a dent in, and then resume with the usual width you are using.
Step 2: Membranes and Claws
The wing membrane is generally leathery, though I sometimes exaggerate the elasticity of it. In this wing, I placed lots of folds and wrinkles, but you can also make a gentle curve in place of these folds -- i.e. elasticity. When making the membrane closest to the beast, put a point at the elbow's area. You can forgo this if you want the membrane to attach to the flanks of your creature.
If the membrane is stretched, place parallel marks along its edge. . . Or something like that. You're going to have to refer to the picture for that.
Then add the claws to the ends of the wing -- from the tips to the joint that conjoins the fingers.
Step 3: Refine
Take an art pencil with a softer lead and darken the lines made. Well, just darken the lines, nonetheless. This is just to make the wing look nicer for the next step.