They are simply great. However, it seems they don't pay much attention to the materials. In the future, I want to work with the materials.
Um, lol, what materials are you talking about? The graphics in the game are broken. Specular (gloss) works, but causes side effects. Normal map (bump) only works for reflecting water; in other cases, it is broken. And detail texture either works for objects with seamless unwrapping or for working on top of a regular texture, but in most cases, it worked instead of the regular texture, and I got the impression that these three functions conflict with each other: if we use Specular, then normal map and detail don't show any visual effect at all.
And the saddest thing is that no one wants to fix this, neither the authors of 5.5 nor the modder with the source code of 3.0.