Render Does Not Show Emissive Elements

[CMCORE]

I have an issue with the rendering environment not consistently rendering emissive elements of my designs. For example, on my LED lights for this trailer model, the "pre-render" always shows the LEDs, but when I go to render, some or all of the LEDs appear as non-emmissive and black. As I turn render on and off or go back into the design environment and back again to render, then that will typically make the LEDs work or sometimes make other LEDs have the same issue. This has been the case ever since I've started using Fusion a year and a half ago. I cannot post the trailer design due to it being for a customer, but I can post the LED lights I've been using. If anyone has any ideas why this happens, I'd love to hear them! Thanks.

Here's a few screenshots. First two photos are pre-render. The rest are during the render.

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[TrippyLighting]

I did no see the effect you described in my quick tests, but I do note that your lamps are not modeled properly.

Your LEDs are basically embedded in polycarbonate.

TrippyLighting_0-1726505156676.png

I would shell that body:

TrippyLighting_1-1726505180466.png

[CMCORE]

Thanks for the reply! I'll give those a quick shell and see what happens. I'm going to guess that it will improve the look of how the light emits and not necessarily the affect the issue I'm having, but maybe it will!

[CMCORE]

Definitely still doing it.

CMCORE_0-1726507063310.png

[TrippyLighting]

Its not doing it on the small light models you posted.

Could you create a dummy assembly with the same modeling workflow you used in the proprietary design and see if this can be reproduced? 

[CMCORE]

Sure! I'll see if I can get that posted by the end of today. Thanks!

[TrippyLighting]

Something else you could try is to render the LED light without the polycarbonate covers. If that resolves the issue, then at least we have narrowed it down to these covers.

[CMCORE]

Here's the dummy file. BTW, this render issue only occurs when using "In Canvas Render". Also, when uploading, it would not allow to upload a .f3z file, so I had to break all my links and upload as a .f3d file. Hopefully that doesn't affect testing.

I did a few experiments in this same test file that I uploaded. I broke the link on one of my LED lights so that it was no longer referenced externally- still had the same problem. Then I tried hiding the poly cover on a light that still had the link- still had the same problem. Then I tried removing the poly cover altogether from the light I broke the link to- still had the same issue. Sometimes the LEDs appear, sometimes they don't, and sometimes different LEDs will appear while others don't, and I have not nailed down any consistent pattern yet.