Simulate fisheye lens using exact lens specs


I have been developing a project and I need to simulate a camera using a fisheye lens based on the exact specifications of the lens. One solution I have found is to use multiple cameras capturing from different angles and then project their render targets onto the sides of a sphered cube. ( thank you @Arkiras ). Link to Arkiras’ fisheye lens.

While this works, I need a way to be able to adjust my camera