@Altair44, I have seen that asset sometimes, but I haven't tried it. I have checked the description, but as far as I understand, the asset doesn't generate the planets in a procedural way, so it should be a regular mesh with a material/materials assigned. Though the foot step system in GKC has two detection types, regular meshes and terrains. Only for terrain, a function is used to get the current texture on the place where player is and play the sound according to it. With regular meshes, the surface is considered the same for all that 3d mesh, as for now, there is not a function that detects the type of texture in a regular mesh (not sure 100% if this can be achieved). Or maybe that asset has a system for the planet or a painting tool that allows to get the texture at any position of the planet. Or maybe the planets has some kind of terrain system, so in that case, it maybe has a function to get the current texture of a position. Besides that, there shouldn't be any problem with both assets as it seems that is made to work with any kind of asset. Thank you very much for your purchase @OldUnityNoob, very happy to hear that Don't hesitate to tell me any suggestion for the asset and any feedback is always welcome as it allows to improve the asset as much as possible. Regards.