The picture immediatly above looks like it is using a projected texture (decal). Decals will be in A7, bu are not available now.
However, you can improve the resolution of the dynamic lights through the compiler. When your compiling,
click on the arrow in the bottom-right corner for advanced options. Then adjust the
Tesselate Shaded slider.
Lower values will divide surfaces into more triangles (smaller), and higher values will divide less (larger triangles). So you obviously want the lowest setting possible so that the triangles are NOT NOTICED.
Be careful though, because setting this variable too low will increase build time, lower the FPS, and can cause build errors. The trick is finding the median through a lot of testing.
Good luck...