NewModel

public List<BakedQuad> getQuads(@Nullable IBlockState blockState, @Nullable EnumFacing side, long rand) {
        if (side != null) return Collections.emptyList();
        assert IExtendedBlockState.class.isAssignableFrom(blockState.getClass());

        Map<String, Pair<IModel, IModelState>> map = new HashMap<>();
        rail16vx(map, stateT(tern(+axialGap / 2, 0F, 0F))); // left
        rail16vx(map, stateTR(tern(-axialGap / 2, 0F, 0F), rotY(180F))); // right
        sleeperNSpikes(map, stateT(tern(0F, 0F, +0.25F)));
        sleeperNSpikes(map, stateT(tern(0F, 0F, -0.25F)));

        EnumTrackDirectionSWNE dir = ((IExtendedBlockState) blockState).getValue(BlockTrackSWNE.direction);
        IModelState baseState = stateTR(tern(0.5F, 0, 0.5F), rotY(dir.getIndex() * 90F));
        IBakedModel bakedModel = (new MultiModel(null, null, null, map)).bake(baseState, DefaultVertexFormats.ITEM, ModelLoader.defaultTextureGetter());
        return bakedModel.getQuads(blockState, side, rand);
    }