Focal length as default for VrayPhysCam instead of Field of view

[kosso_olli]

Hey guys,
can you please make focal length the default when creating VrayPhysicalCamera? It just does not make any sense to have field of view as default. It is a value which is never used in reality.

Thank you.

Regards

Oliver

[yavor.rubenov]

Hello,

Actually the focal length is the default. FOV is used only when creating a camera for the current viewport.

Best regards,
Yavor

[kosso_olli]

Which is what I do most of the time. Why the difference in behavior?

[^Lele^]

Because a perspective viewport will have only an FOV value, and that is what is transferred to the created camera.
It's an easy fix to script, as it is to fix manually if your workflow requires it (one checkbox, no loss of information using it.).
Creating a camera from a view means the camera has to follow what the user set the viewport to, hence the choice.
I'm unsure this should change for everyone: if you need a specific real world camera to be matched, you'll have the lens info and the position info, and create the camera *in* a viewport, instead of *from* a viewport, to then align it with the references.
This approach will keep the Focal Lenght priority as it should.

[kosso_olli]

and create the camera *in* a viewport, instead of *from* a viewport, to then align it with the references.
This approach will keep the Focal Lenght priority as it should.

On our end, the camera is explicitly created *from* a viewport because most of the time the camera is matched using the 3dsMax internal perspective match or camera match tool, in conjunction with measured reference in the plate. Hence the confusion as to why the PhysCam has FOV as default. With your explanation, it makes sense however.

[Joelaff]

I am guessing it’s the default because in focal mode VrayPhysicalCameras have lens breathing built in.

So in focal length mode maybe it wouldn’t always match the perspective view the camera was created from if you were very close to the subject??

Just guessing.