Thank you @sundog and @JohnMAXX. So I did a new test. this time, in an area where I have no Orthos, only default SFD Global. Here are the results:
SMP enabled with HDR on
SMP with HDR Off
Default clouds
Also I have played around with the time of the day but it is always the same results
Tried as well the following with no luck:
- I have deleted the shadercache but it is always the same results.
- Change the time of the day.
- Switch to OGL,/
Also, I saw a post in FB, I think x-plane group, someone had no shadow as well with SMP in Vulkan, no idea if this related though :(. Kinda clueless now.
Thank you for your help!