Is it one and done or can I come back and the same people that failed will try again (without leveling in-between)? Because I assume it is a dice roll in the background so sometimes it will work and sometimes it doesn't. I think it is dumb to have to reload until it works. I originally thought it was just based on a simple stat like intelligence or wisdom until reloading actually worked to get the result I wanted with the same character that failed before. There has to be some sort of RNG involved.

I would like to know if I can force a new check somehow if I fail originally? This is for like finding illusionary walls etc