http://prntscr.com/4bsfu
What texture do I need for that part

I assume you're asking about the blank texture, which is the groin texture.

I have groin texture, how come its not showing

It takes textures more time to update ingame than joints, ghosts etc. You can speed that up if you
/dl
/lp 0
yourself

Still aint showing
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Also I changed my ground texture picture and it's not changed