void vox_sky_solid(struct voxscape *vox, uint8_t color);
void vox_sky_grad(struct voxscape *vox, uint8_t chor, uint8_t ctop);
void vox_sky_solid(struct voxscape *vox, uint8_t color);
void vox_sky_grad(struct voxscape *vox, uint8_t chor, uint8_t ctop);