NOTE -

There is no disrespect intended to these mod authors. I only list potential technical limitations and/or issues that may occur.

Fallout 4 ported assets

Or ported assets in general. The meshes are often too complex or incorrectly ported, and the textures often look strange due to difference in the lighting engine. Some work, most don’t. You’ll have to do a lot of picking and choosing.

Nuts/Georges Landscape Textures

Both are tuned for high contrast (and more robust normals), to give them a “crisp” look. Unfortunately, on lower pixel response monitors (like the currently common vertical alignment panels found in many, many gaming monitors), this high contrast can cause smearing which is extremely visually unpleasant.

Nutscapes is an excellent aesthetic alternative, and I recommend at least trying it in place of Legacy if you like the look, especially if you have an IPS or OLED monitor. Just be aware of the potential for visual artifacts on some hardware.

George’s has very, very obvious tiling in many desert locations in NV, as well as the same potential smearing. It also has some odd choices (sand dunes in the Capital Wastes, for instance). It’s definitely an alternative, but not one that I can really recommend.

Physically Based

These mods are of exceptional visual quality. To achieve this quality, they were made using methods that work well in modern game engines - unfortunately, they can put undue stress on New Vegas. While they are not guaranteed to cause crashes, they can contribute significantly to instability and stutter in many cases.

By all means, try them if you want, but be forewarned that they are not supported by this guide.