Clearly, the visual style of these pieces leans much more towards realism and would not be perfectly replicable to Roblox. However, these concepts (as do most others) exist as a means for visual styles regarding assets like characters or vehicles to be established, as well as for environments and missions, even beyond technical and artistic limitations, such as in the case of Roblox.
I like it although the first image does not look very good like the HDRI that is seen with a very low quality I recommend using volumetric lights to give a better effect to the scene and give a god-ray effect