Deforming knee or elbow with lattice.Where ?

Anybody can show me where to found the post who explain this feature ? I completly lost it.How to deform knee or elbow etc … with lattice.Thanks

Spiderman by waves:

https://blenderartists.org/forum/viewtopic.php?t=58314

You can also search for Lattice by waves or ROUBAL.

Basically you animate the Lattice using RVK’s

http://membres.lycos.fr/bobois/index_anglais.html

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Maybe it was this one?
https://blenderartists.org/forum/viewtopic.php?t=55997

Shape keys are a better way to do it.
http://kokcito.tk/rvk/ipo.html