Zoom in Alice3?

[chy]

Dear list,

I want to implement zoom (in and out) in a virtual scene but without moving the camera (i.e., without doing dolly in/out). I was able to do it in Alice 2 by changing "Camara.verticalViewingAngle" and “Camara.horizontalViewingAngle.” But these methods are not available in Alice 3. Can this be done? if so, I’d appreciate any pointers on how to do it.

Thank you in advance for your help.