Settings tweaks for better performance

Config/DefaultEngine.ini

@@ -165,6 +165,7 @@ r.Lumen.Reflections.HardwareRayTracing.Translucent.Refraction.EnableForProject=F
 r.Streaming.PoolSize=2048
 
 r.Shadow.CSMCaching=True
+r.Shadow.RadiusThreshold=0.04
 r.Nanite.ProjectEnabled=False
 r.Nanite=False
 
@@ -194,6 +195,8 @@ r.VolumetricCloud.ViewRaySampleMaxCount=64
 
 r.DistanceFieldAO=0
 r.DistanceFieldShadowing=0
+r.AmbientOcclusionLevels=1
+r.Shadow.CSMCaching=0
 
 [/Script/LinuxTargetPlatform.LinuxTargetSettings]
 TargetArchitecture=X86_64UnknownLinuxGnu