There is a bug with the corona camera. When I create a camera by dragging the cursor in the viewport, everything renders fine. But when create it with a single click in the viewport, the render is full red. (3ds max 2018 / daily 2018-02-08)
I can't reproduce this with the same Max and Corona version. Can you post any scene where this is happening?
Empty scene, create a cube and a light then select CoronaCamera creator, uncheck targeted and create a camera with just a single click in the viewport. Re-orient the cam and try to render. It should render black with just a light, red if there is an HDRI.
There is a bug with the corona camera. When I create a camera by dragging the cursor in the viewport, everything renders fine. But when create it with a single click in the viewport, the render is full red. (3ds max 2018 / daily 2018-02-08)
check if the target and camera are in the same exact XYZ position.
That might be the issue, but targeted is unchecked before creation so it shouldn't.
edit : this is the issue, it creates the cam with target at the same position. Even if targeted is unchecked, it does not render anything. Enabling target, moving it then disable it again solve the issue.