How can I check for HumanoidRootParts in a Region3 using FindPartsInRegion?

The question is in the title, thanks for help!

Huh? I am very confused. If you want to check for “HumanoidRootParts” in your whole game you can use Instance | Roblox Creator Documentation, and check for the name “HumanoidRootPart.”

Sorry, the question is not very understandable. I meant, how can I check for HumanoidRootParts in a Region3 using workspace:FindPartsInRegion3WithWhitelist?

Here you go, WorldRoot | Roblox Creator Documentation
This explains it all. Its pretty simple to understand, just some basic cframes.

What do you mean by CFrames. Region3’s are constructed via 2 vectors with no rotations. If you wanted only the humanoidrootparts of the players then use the characteradded event then add their humanoidrootpart inside a table.

I mean positions, my bad. (Has the positions in the code)