Hm.

[ He eyes the activity. ]

I wouldn't do it. After all, if the information is to be gathered, it would be from the individuals performing the activity.

[ He points to the rock, slowly being painted. ]

What you are painting onto it, for example. Some may paint a person, a thing, a place. They may use decor from their worlds.

[ Hey, Silco can see it, even if he hates it, clearly. ]

I wouldn't be interested in providing that information to other people. Were it to be useful, of course.