What goes into making Photorealism in Unity?

 Lighting system

• Standard

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• URP

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•  HDRP
  

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• Ray tracing
  

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• Use Unity 2020.31
• Start with or convert to HDRP
• Go to edit -> Project Settings -> Quality
• make a new quality level by typing in a new name
• In the project window under settings duplicate the HDRPHighQuality and name it HDRPRTXQuality.
• Then drag it to the Rendering pipeline slot in the Project settings under Quality
• With HDRPRTXQuality still selected under the inspector check Realtime Raytracing (Preview)
  
• Go to Windows -> Render Pipeline -> HD Render Pipeline Wizard
• Select the tab HDRP + DXR
• Click the Fix all button
• Click the icon for the scene settings located at the top of the viewport. It looks like a video camera.
• Set Camera anti-aliasing to temporal anti-aliasing
• Also under the effects drop down at the top of the viewport check Always Refresh
  
•  Select game camera and in the inspector make sure that Temporal Anti-aliasing is chosen for Post Anti-Aliasing
  
•  
• Baked lighting
  
• Lighting settings
  
• Types of lights
  
• Camera filters/effects
  

•  Textures/Materials
  
  • Shader/Material types
    
  •  Shader graph
    

• Proper texture maps
  
• Albedo
  
• Metallic
  
• Smoothness
  
• Normal Map
  
• Bent Normals
  
• Height Map
  
• Detail Mask
  
• Ambient Occlusion
  
• Mask map
  

Unity