> The sort of thing you'd solve in 30 seconds with Google in 2024. I’ve implemented this in my own games and I remember that the solution was basically raycast

> The sort of thing you'd solve in 30 seconds with Google in 2024. I’ve implemented this in my own games and I remember that the solution was basically raycasting. But it was NOT some 30 seconds thing. It was a major effort anyway. (There are of course other options, like rendering a picture with a different color for each object, and sampling the color to figure out what you clicked on. And “color” may just be a 1-channel integer object ID.)