It should be an option for the simplest fog adapted for mobile, because mobile fog is currently not working without Mobile HDR option.
I count on your prompt response
Hello Sanyol,
We do realize the engine has a limitation with certain features when it comes to rendering and we have some great documentation on how to optimize development for mobile devices.
This documentation goes through LDR, HDR, the limitations of each, and how and when to use which.
Mobile Performance Guidelines
I hope this helps explain your question and how to add the effects you are looking for while maintaining your mobile devices performance. Because there is a lot of content on various reasons as to why and how your mobile device renders certain effects, this documentation can provide a more in depth answer.
Thanks,