What is URP?
URP or Ultimate Realism Pack is a package designed for Prepar3D v3.1 and up. It includes a preset(s) for PTA Tool/ReShade, a set of custom sky and Sun glow textures. The main goal is to achieve the most realistic ambient lighting in Prepar3D with the combination of above factors.
What is PTA Tool?
PTA Tool is the next best thing after sliced bread. :)
It is a neat and simple app for tweaking the values of P3D graphics engine shaders.
More info at: http://1coder.ru/PTA/
What is ReShade?
It is DLL based post-processing injector for any app/game that uses DirectX/OpenGL.
Think of it as a color grading used in Hollywood movies, but only for DirectX applications.
More info at: reshade.me/
Sky and sun textures can be used widely in all versions of Prepar3D or even in FSX, but they are designed and tested in Prepar3d v3.x, so I can't provide support for older versions or FSX.
PTA Tool is compatible with Prepar3D v3.1-3.4, and it is updated on a regular basis.
ReShade v3 is compatible with Direct3D 9, Direct3D 10, Direct3D 11 and OpenGL applications/games.
Is URP free?
Yes! And it will stay that way.
But don't be fooled, a lot of weeks, days and hours are invested in URP! I even lost a track how much time I've spent working on it.
You wouldn't believe how time consuming is to tweak every single value in PTA Tool, then run P3D to test the change. Do that loop for 300+ times and you will get the picture. Not to mention creating and testing custom sky textures and tweaking the colors for hours and hours to match the PTA Tool preset! Oh, did I mention ReShade preset tweaking for hours, then tweak it more to match the preset and skies?
Do this look intimidating to you yet?
So yes, URP is, and will stay freeware, and you can thank me also by sending a donation using Paypal. Thank you, highly appreciated! :)
Is URP a longterm project?
Yes, I've started working on it in May 2016, creating a first preset (URP v0.8) for PTA Tool. Eventually the project grew up with added custom sky and Sun glow textures in v0.9. Since tweaks in PTA Tool are changing to adapt to the latest changes in P3d shaders, I had to adapt URP too, and as you already know it takes time.
Current URP version is v1.1, and if you ask me, it is by far the best looking one.
Does it affect FPS?
PTA Tool tweaks itself will not eat a single frame, tested it. But if you want to see cloud shadows in P3D, you must enable them in the options and it can take few frames on a weaker systems. In my case, I didn't noticed any difference in FPS with bunch of shadow options ticked in P3D.
URP ReShade preset could take ~5% of FPS on my machine, but I can't confirm that for sure since the framerate in P3D fluctuates a bit.
So yes, it's safe. ;)