If you want to quickly see the difference while in-game enter these console commands SEPERATLY:
r.PostProcessAAQuality 6
r.MSAA.CompositingSampleCount 8
----------------------------------------------------

This will change the in-game "ultra" setting for anti-aliasing to be a ton better:

1. Navigate to \ARK\Engine\Config\BaseScalability.ini

2. BACKUP BaseScalability.ini

3. Open BaseScalability with your preferred text editor.

4. Find these lines
[AntiAliasingQuality@3]
r.PostProcessAAQuality=4
r.MSAA.CompositingSampleCount=4

5. BACKUP the lines like so
[AntiAliasingQuality@BACKUP]
r.PostProcessAAQuality=4
r.MSAA.CompositingSampleCount=4

6. Add these lines to change the in-game ultra anti-aliasing setting to be the highest quality it can be
[AntiAliasingQuality@3]
r.PostProcessAAQuality=6
r.MSAA.CompositingSampleCount=8

On this page there are some sample pictures and additional information on THE anti-aliasing:
https://docs.unrealengine.com/en-us/Engine/Performance/Scalability/ScalabilityReference

This page has more cinematic graphic settings offered by the unreal engine 4 which ARK runs on.
https://github.com/GameTechDev/UnrealCapabilityDetect/blob/master/Saved/Temp/Win64/Engine/Config/BaseScalability.ini

I discovered the better anti-aliasing first by reading through the Scalability Reference page. At first I only discovered the r.PostprocessAAQuality 6 console command. After I discovered that UE4 has cinematic graphic settings I found the page above that contains all of them. There were many commands I had to enter. So I tried entering them like this:

DO NOT ENTER MULTIPLE GRAPHIC CONSOLE COMMANDS AT THE SAME TIME OR YOU WILL CRASH. DO NOT ENTER THIS INTO YOUR CONSOLE.
r.PostProcessAAQuality 6 | r.MSAA.CompositingSampleCount 8

but there were many more. For example here are just the shadow settings:
r.LightFunctionQuality=1
r.ShadowQuality=5
r.Shadow.CSM.MaxCascades=10
r.Shadow.CSM.MaxFarCascades=0
r.Shadow.AllowForegroundShadows=1
r.Shadow.RadiusThreshold=0
r.Shadow.CSM.TransitionScale=1
r.DistanceFieldShadowing=1
r.DistanceFieldAO=1
r.Shadow.MaxResolution=4096
r.Shadow.DistanceScale=1.5
r.Shadow.MaxCSMResolution=4096
r.Shadow.PreShadowResolutionFactor=1.0
r.VolumetricFog=1
r.VolumetricFog.GridPixelSize=4
r.VolumetricFog.GridSizeZ=128
r.VolumetricFog.HistoryMissSupersampleCount=16
r.LightMaxDrawDistanceScale=1
r.CapsuleShadows=1

I then looked for an alternative solution to entering tons and tons of console commands to have cinematic level graphics, and that ended up being editing the BaseScalability.ini. Reading the BaseScalability.ini I came across this:
; Note: "r.MSAA.CompositingSampleCount" goes upto 8 however we're limiting it to 4 in a scale of 1/1/2/4
; Meaning that it is off for the first two detail levels.

and now we have better anti-aliasing!