An empire faction with the enchanters trait builds a scrying pool, but the model file is the empire's sage.

The problem is (bolded):

        <ImprovementTypeArtSubPack InternalName="Art_ScryingPool_Empire">
            <SupportedBuildingStyle>EmpireStyle</SupportedBuildingStyle>
            <TileDesign>F_Sage_01</TileDesign>

fixed by:

        <ImprovementTypeArtSubPack InternalName="Art_ScryingPool_Empire">
            <SupportedBuildingStyle>EmpireStyle</SupportedBuildingStyle>
            <TileDesign>F_Scrying_Pool_01</TileDesign>

cheers