This build does only two things for Terraria 1.3.5.3:
Removes the forced minimum zoom.
Allows resolutions greater than 4096x4096 (memory allowing).
This build doesn't currently work with TModLoader 0.10.0.2. The compiler version that they are using is newer than the version of Mono.Cecil that I'm using and the two don't place nicely together. A ticket has been filed with the TModLoader team.
This should give you 1:1 pixel resolution at resolutions above 1920x1200 in Terraria 1.3.5.3.
To clarify, the only thing that this mod does is remove the forced minimum zoom level in Terraria. If you open the options and the lowest value for zoom is higher than 100%, this will let you set your zoom to 100%.
Note that this currently requires that you have the .NET Framework 4.6.1 or higher installed.
The most common complaint appears to be this not running or appearing to have crashed on run. Rebooting, then running RTResolution again, appears to fix this for the vast majority of users.
Showing 1:1 pixel resolution at 3840x2160 in Terraria 1.3.5.3