Hi there,

i am trying to figure out how i would get the FOV from the projection Matrix from camera. but i cannot really get the right informations.

in the end i need to change the projectionMatrix so that it represents a bigger FOV.

what i have:

` const babylonProjectionMatrix = camera.getProjectionMatrix(true).clone();`

wich looks like:

```
{
"0": -0.8108331561088562,
"1": -0.42402830719947815,
"2": -0.4034222960472107,
"3": 0,
"4": 0,
"5": 0.6892840266227722,
"6": -0.7244912385940552,
"7": 0,
"8": 0.5852773189544678,
"9": -0.5874415636062622,
"10": -0.5588943362236023,
"11": 0,
"12": -2744.837890625,
"13": -814.970703125,
"14": -511.23333740234375,
"15": 1
}
```

this should represent a camera with a 45° FOV. what do i need to change or calculate so that it represents a for example 50° FOV?

i tried to use this logic here but it seems that the babylon matrix is not like openGL

Any help would be awesome!

(i want to do this, because i am feeding the matrix into loaders.gl to receive tiling information from the actual camera perspective. but my virtual camera needs a little bigger fov)