I am using a 3D button in my scene. I am setting its position a little to the right of the camera and its no longer clickable. If I keep the button exactly in front of the camera, then there is no issue. Is this related to raycast? How can one solve this?
As you see the button is inside a dome. I may have to add buttons to most of the corners of the dome so the position needs to be fixed. Can we extend camera’s raycast field?
This is because your dome is pickable 
just run this:
dome.mesh.isPickable = false;
and it should work
Thanks alot