This is just a quick tips how to do better render. The secrete is to use ACES color space. This is applicable to any software.
In this case I will show you in Houdini.
1 . Download ACES here : https://opencolorio.readthedocs.io/en/latest/quick_start/downloads.html
2. Extract the folder and put this in C: drive
3. Add this line in houdini.env example OCIO = "C:\aces_1.0.3\config.ocio"
Thats it pretty easy right. Hope this is useful to you.