CXR saves in half the resolution

[Drawehn]

We have the weirdest issue. We are sending an image to render in 4000px (we are using backburner) and it renders alright in 4000px but when we open the saved cxr it is only half the resolution (2000px). Is that a bug or some totally buzarre feature that we accidentally discovered? We are using corona 12 Hotfix 1.

[Drawehn]

We fixed the issue somehow but i still have no clue what caused it.

[maru]

My bet is the AI upscaler in the Scene tab - https://docs.chaos.com/display/CRMAX/Scene+Tab#SceneTab-ProductionUpscaling
It does exactly that - renders your image in half width and half height and then upscales it to what you have in the 3ds Max output settings. If you save a CXR, it will be the original non-upscaled data.