HDRI environment map not visible directly

[The Syndicate]

I have a scene that will not render the direct of my HDRI map. I can see the map in reflections / refractions. The map does not appear in the beauty pass of the Corona frame buffer or in any file format that I export.

I opened a different scene and don't seem to have the same issue. I assume there must be a difference in environment / exposure / camera settings between the two scenes but I can't pinpoint what it might be. Any one have any ideas?

I have tried both the Max environment slot and the Corona environment slot. I am using Corona 1.5 (hotfix 2) and 3ds max 2017. I did recently update 3ds max and did not have the problem prior.

Edit: Other things to note...I have played with the exposure and it isn't a matter of the HDRI map being too dark. I have also tried overriding the "Direct visibility ovverride" in Environmental overrides just to see if I could get anything to show up with no success. I can see the map in my viewport when I use the Max environment settings and display the map as the background. 

Edit 2: I have also tried different HDRI files. I have successfully rendered in this scene with the one I had in use. Again, this was prior to updating max and also prior to updating Corona to 1.5 (I believe). Surely before hotfix 2.

Edit 3: Map does not appear in my Direct or RawComponent render elements.

Edit 4: The HDRI map appears when I use Scanline Renderer. I have tried using a CoronaBitmap instead but that doesn't appear either.

[Jadefox]

Try and increase the output. When I use sun and sky with an HDRI as an environment override the exposure settings is so low the hdri is barely visible. I have to crank it up to 50-60 sometime to match the exposure

[The Syndicate]

I have tried increasing the exposure, but the background is simply black. I do not have a CoronaSun turned on - the scene is at dusk so the HDRI and some scene lights were providing my illumination.

[romullus]

If you right click on that black background in VFB, what numbers do you see? Is it all zeros or any other numbers?

[The Syndicate]

Welp...3ds max crashed while I was attempting to copy the objects into a new scene. After restarting, my map has decided to appear. I guess it was just hungover from Thanksgiving...thank you for the help!

[maru]

The best solution would be simply sending us the scene. If you cannot share it (e.g. the hdri is not free), you could send it to our support here https://coronarenderer.freshdesk.com/support/tickets/new

[JEK5019]

just answering this since there was never a final resolve.

i just had this issue myself - i switched to the default scanline render - did a quick render - then switched back to corona - restarted interactive render and voila! hdri background was back :)

[Tawhid]

Agreed with JEK5019, my environment was rendering black and the only solution was to revert back to default scan-line renderer and then to corona render , that seems to have solved the problem.