1. look for the shotgun chalk near double tap and on the right there is a gap in the rock go in the rock and then press f.
2. go to the small hut beside it there is a rock. Go to the back of the small hut and you'll see a teddy bear hiding in the rock (you will only see it once you have done the first step) press f on it. It way take a while to get the indicator.
3. lastly go near jug, there is a rock with 2 red crystals, there is going to be a teddy bear laying on the rock. On the left side (the picture for the 3rd hint on the main page should help you what I am talking about) press f on it and then pap room will be open.

sorry if u don't get what I am talking about im bad at explaining things sometimes