Marmoset Toolbag 3 - Camera

Phoenix995

Hello,

I am trying to get a camera from Maya to Marmoset. Is there a way, to just export the camera?
What i am trying right now is copying values from my camera in Maya to the camera in Marmoset. And its works really well, as far as Transforms are concerned. 
But when it comes to Field of View in Marmoset and Focal Length in Maya i don't really know which value to copy. What i found out is, that a Focal Length of 35 in Maya roughly is a FOV of 32,5 in Marmoset. Is there a simple way to get these values across without trying?

cheers 

EarthQuake

If you export an FBX file, it should save your camera including the position and various parameters like FOV.

There may be some inconsistencies in how FOV is calculated between Maya and TB as you've noticed.

There is also a bug which we plan to have resolved for the next build, which causes the transforms to come in incorrectly for static cameras. It works for animated cameras though, so a work around is to create a camera in Maya with keyframes on frame 0.

Phoenix995

thanks for the answer.
but somehow the imported cameras have a wrong value in FOV. the translate and rotation works fine.

Phoenix995

What works is having maya open at the same time and changing the the FOV value till the the viewport section looks the same.

trollkind

Hya, we're having the same problems in our pipeline currently and since we want to combine technical passes from Maya with the RGBA from Marmoset, so eyeballing the vertical FoV to match the uncropped horizontal FoV from Maya wasn't enough for us and we busted multiple heads trying to solve it mathematically.
What works for us is setting keys to fix the above mentioned bug, but afaik we need two keys (same position on different frames) to stick. We also switched from standard fbx to .dae and magically get a FoV in Marmoset.
I'll keep you posted if we find out anything new or realize our pixel perfect camera transfer was a fluke.

Phoenix995

Sounds cool
I will try that

HapZungLam2

Have you try using the same focal length as your maya being setup?  Don't touch FoV, just line up with the focal length

Phoenix995

i cant find a focal length in marmoset ...

EarthQuake

Phoenix995 said:

i cant find a focal length in marmoset ...

Focal length is the MM setting next to FOV.

Phoenix995

ah ok
no, its not the same as in maya...

EarthQuake

Phoenix995 said:

ah ok
no, its not the same as in maya...

Can you send me your FBX file and a screenshot from the camera in Maya so we can debug it?

Thanks

Phoenix995

Ok
i created a simple Setup to show you what happens.



In maya, as you can see, we will only get the red square and the green line in the image, the blue part will not be in the final render.

But in Marmoset we get the blue part and a bit more rendert..

Phoenix995

ok i got it
in maya normally a cameras "Fit Resolution Gate" is set to "Horizontal", but marmoset needs overscan. So if you set your cam in Maya to Overscan and the chose your crop, it will be the same as in maya.