Stride: Is there a way to improve the quality of the reflection from a skybox texture?

When using a highly reflecting (full metalness (1) with no roughness (0)) PBRMaterial, the resolution of the reflected Skybox Texture is very low.

The reflection of the Skybox is not from the PostFX Localreflection but also is there without.

But the quality is very low, as you can see (FileTexture is 8192x4096):

vvvv gamma 2021.4.12