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Tweak Assistant

The main purpose of the PTA tool is to allow simmers to automates tweaking different Prepar3D shaders and config parameters that will result in more eye-catching virtual flight experience.

Using this tool, you can apply tweaks fast and convenient way without manual editing files and other routine operations.

Rayleigh scattering

Water surface

Atmospheric haze

Night lights

Clouds tuning

And much more...


see documentation

30 different tweaks with fully customisable options for clouds, lighting, atmosphere and water adjustments. HDR mode and FXAA parameters and tuning.

Shaders tweaks parameters can use Prepar3D specific variables in expressions (PTA 2.0 or later required).

Post-process effects, adapted from SweetFX that can be used natively in Prepar3D without Reshade:
Sepia, Curves, Levels, LiftGammaGain, Technicolor, Vibrance, LumaSharpen, DPX Cineon, Tonemap adapted for Prepar3D renderind engine.

Each post-process shader can use Prepar3D specific variables that provide the additional flexibilty of post-processing.

In addition to the PTA built-in tweaks and post-processing you can also create your own tweaks and use it together with PTA tweaks with no conflicts.

Each PTA preset may also include a separate adjustment of main P3D config file.

Strict control of sim core shaders integrity and the easy recovery mechanism for original shaders and config file.

Detailed illustrated help on each tweak and its options.

Logging of all operations with detailed error messages and hints.

Customisable skin of tool interface with hiDPI support.


Windows 7 or later, installed Prepar3D v 3.1 or later, 50+ MBytes on hard drive.

The tool is incompatible with FSX to Prepar3D Migration Tool (in enabled state).