Screen position to world - top of the screen unsupported. Please help.

[Kurt-Dekker]

If your world is flat, it might be better to use the flavor of Raycast that operates against a Plane (mathematical plane).

Keeping a plain/terrain within the view frustrum

You can get rays from the camera at a given spot, so one approach is to cast rays from the camera corners and make sure they hit your terrain, or hit your terrain bounding box. To ignore screen pixel dimensions and just get the corner rays, this is the API you want: The nice part is that it doesn’t matter how your camera is set, how your field of view is set, etc., It just works. You can use this to raycast and hit physics on your ground using: asks “did I hit any collider in the scene?…

In any case, to help gain more insight into your problem, I recommend liberally sprinkling Debug.Log() statements through your code to display information in realtime.

Doing this should help you answer these types of questions:

• is this code even running? which parts are running? how often does it run?
• what are the values of the variables involved? Are they initialized?

Knowing this information will help you reason about the behavior you are seeing.

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