flesh bot

You might be thinking of one of the Brazilian Wandering Spiders https://en.wikipedia.org/wiki/Phoneutria_nigriventer

Was featured in the second part of this brilliant documentary https://archive.org/details/deep_jungle

Presenter runs into one while searching for a spider that had reportedly made off with a chicken (not the same spider).

I’d recommend traktion waveform. There’s a free version. Likely has most if not everything you need. Pretty sure the underlying engine has been open sourced.