Check if a vector3 point is within a collider

I am making moving cameras for my 2D platformer. I want to make a point in space that follows the camera test if it is in a collider with a tag (“CameraAugmentation”), and then set the world camera size (in orthographic) to the size of the collider it is in. Is there a way to do this?

Also, is there a way to use a texture with different shades from black to white, then have a point detect the colour level of the point it is on and turn that into a number?

Sure.

Can you describe what you want to do a bit better? I have a rough idea of what you want, but not entirely.

You can use the bounding box of the collider to check if the point is within the colliders bounds.

Yes, or OnTriggerStay()