The wings are in 3D, yes.
Is it only step 203 that is troubling you, or is it the entire folding sequence for the wings (steps 203-235)?
The wings are relatively challenging, so my only advice to you is to take the steps very literally (there are no tricky folds; they are all relatively straight-forward) and try to replicate the next step as well as you can.
Hope it helped (a little bit.)
P.S. Don't post multiple posts relating to the same thing (being stuck on the wings) in 3 different topics.

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Hi! It's been a long while since I've been active on here. I deleted my Dropbox years ago, so some things, like my Dragonfly Varileg guide, are lost to time. I may still have other things, though! Email me if you have any questions.