Has anyone made a fullpack covering all dds textures for a Cartoon style? simplifying them to the "FR Legends" style
I thought a lot about putting this idea into practice, but knowing if anyone has already done it would be interesting, especially to see how it looks in practice.
LFS is already very light, but with textures like this it would be light and pleasant to play with non-detailed textures.

I'd highly doubt it, as LFS is a simulator, not an arcade game. You could (somewhat) easily achieve what you're looking for by running all the .dds files through a cartoon filter.

There is no need to modify textures, Live for Speed includes a post-processing shader, which can be modified. Here is a screenshot where Sobel and quantization are applied directly in game

I did not backup that shader and lost it, so I did one similar from scratch. It is very simple, because I have zero experience with HLSL, but can be further improved.

The shader can be downloaded here:
https://www.lfs.net/attachment/636407

Copy the shader into shaders folder. Open it in a text editor and change resolution defined in line 18 to your preferred resolution. Enable post-processing shader in game menu. Warning: not suitable for VR headsets.