[Glowing colors when preset is applied]

I am glad to report things are good now. Thanks for your help! I think the case is closed for the time being.

[Glowing colors when preset is applied]

Oh sweet. I must have missed it during my attempts to fix it. I will give these two fixes a shot and will report back.

[Glowing colors when preset is applied]

If this info helps, my computer is a custom build as follows:

Asus Z390 Gaming + Wifi motherboard
Intel i5-9600K @ 3.7/4.6Ghz
Nvidia RTX2060 Super, 8GB GDDR6
32GB DDR5 (4 x 8GB) DDR4 @ 3200MHz
OS installed on Samsung 970EVO M2 form factor, 1TB
P3D installed on Sandisk 2.5" SATA SSD, 2TB (D:\Prepar3d v4\)
Windows 10, build 19042.1586
Latest Nvidia display driver to-date, v512.15 @ 3/22/2022

[Glowing colors when preset is applied]

Thanks for your reply,

Before I could try out your solution, I've realized there's a bigger problem going on - application of a preset causes a majority of the ground tiles not to show up in the sim, no matter how many times I cleared the cache, rebuilt the scenery library, etc. I've attached more screenshots showing this problem, and if you look closely to my original screenshots above, you can also notice blue spots along the ground.

After several hours of trying to solve the problem, I have had no other choice but to reinstall the entire simulator and all associated addons.

Out of curiosity, I did a fresh install of P3Dv4 and immediately installed RDShade 1.0.0 and applied the same preset, and the same problem appeared.

I am now on my second reinstall of the sim.

[Glowing colors when preset is applied]

I am using P3D v4.5.14.34698.

Whenever I apply a preset (in this case, "Natural Preset (made by simflyer 1.1") there are glowing clusters of various colors visible around certain environmental elements, as shown in the screenshots I've attached.

If I restore the default shaders and relaunch the sim, the problem goes away.

Any ideas? Or am I missing something?