strange reflection, dark material on curved surfaces

[steevenberube@gmail.com]

Hi,

I get this strange dark reflection on the table. It does the same on the chair and whatever material i use. It does the same on a new cylinder created with Max. Can you help ?
Corona 8
Max 2018

[maru]

It is the "black highlights" issue listed here: https://support.chaos.com/hc/en-us/articles/4528311915025-Known-bugs-and-limitations

It is usually caused by:
- a Corona Light Material with "emit light" option disabled
- objects with "visible in reflections" disabled, or similar unphysical properties

The safest solution is to restrain from using unphysical effects like the above.

[steevenberube@gmail.com]

Thanks, found it!

I had an object with > object properties > visibility > 0.5