Not much to say about this one! Just some smoke effects made from randomly bent paperclip wires with plastic/glass beads of various size on them, then smoothed out between each other with milliput+fine magic sculpt mix.
The title honestly explains it all.
What I did was carefully cut out & sand desired shape for the membrane. The somewhat tricky part is to cut it to confirm in shape to the limb of your choice (forearms for Tyranid Warrior boneswords in this case).
Then you attach a L-shaped pin facing the limb and attach it to the limb, preferably with gel superglue to secure more time for posing. The presence of an L-shaped pin kind of bulks up the wing which can be alleviated with greenstuff work, I mean it will be kind of needed either way I think to add segmented wingbones bones. And below is a little doodle of a biological jet engine that I shall put on top!
To mask the connection points alongside the membrane & the wing arm I have added details like those found on ForgeWorld shrike models, kind of fleshy connective tissues. Always admired those details.
But if you're not feeling that in particular, I'm sure just gently smoothing it out with some greenstuff would help.
Overall the result is more or less a success I'd say, but for the future I almost feel like sculpting limbs on top of the membrane might be an easier way of doing things, depending on the size of the creature.
