Use rendering settings to set the shadow and curve smoothness for your published scene.
1. Return to the viewport settings panel and select Rendering Settings.
Rendering settings define the smoothness and resolution of shadows in your scene.
2. Turn on Anti-Aliasing to set curve smoothness
Anti-Aliasing smooths the edges of curves in your scene. Turn this setting on and move the slider to adjust the smoothing quality.
3. Set shadow resolution and softness
Use the slider to set the resolution of shadows
Use the tabs to choose the type of shadow filter and, then set the level of softness. Choose “ultra” for shadows that automatically mimic real-world shadow softness.