I have no idea whats the problem. can someone help me?
3dsmax 2023
Corona 9 hotfix 1
Hi,
Generally, lighting and overall quality can slightly differ between interactive and final render, but I think this case involves something else.
This can be related to the grass/vegetation material, specifically its bump/normal map.
Can you please attach the scene so we can investigate it further?
Thanks for the replay and yes i will attach 
Hi Mehran, is this still valid? If so, please let us know and/or share your scene at https://support.chaos.com/hc/en-us/requests/new
Thanks!