tracking (e.g. in computer graphics)

Exploration Stage: Greenhouse
From: Isabelle
Description: We need the poison of the Ouroboros to make the antidote. And he's definitely in the greenhouse. But how on earth am I supposed to find the snake in this jungle? Oh, I don't know! There are several areas in the greenhouse that are covered with sand. There must be some tracks where the snakes have crawled. Let's look for them.
Completed: I knew I was right. There are traces of the snake's path in the sand. It looks like the Ouroboros crawled all over the greenhouse. The paths intersect. But why are the places where he passed glowing like this? This is unusual. Maybe the Ouroboros is under some kind of spell.