Fix T49104: normal problem in imported Alembic objects

Recompute the normals if the normals are supposed to be varying (e.g. in
the ISchema).

1 files changed, 7 insertions, 3 deletions

diff --git a/source/blender/alembic/intern/alembic_capi.cc b/source/blender/alembic/intern/alembic_capi.cc
index f9364d55753..f42c708b4c2 100644
--- a/source/blender/alembic/intern/alembic_capi.cc
+++ b/source/blender/alembic/intern/alembic_capi.cc
@@ -936,12 +936,12 @@ static DerivedMesh *read_mesh_sample(DerivedMesh *dm, const IObject &iobject, co
 
 	CDStreamConfig config = get_config(new_dm ? new_dm : dm);
 
-	bool has_loop_normals = false;
-	read_mesh_sample(&settings, schema, sample_sel, config, has_loop_normals);
+	bool do_normals = false;
+	read_mesh_sample(&settings, schema, sample_sel, config, do_normals);
 
 	if (new_dm) {
 		/* Check if we had ME_SMOOTH flag set to restore it. */
-		if (!has_loop_normals && check_smooth_poly_flag(dm)) {
+		if (!do_normals && check_smooth_poly_flag(dm)) {
 			set_smooth_poly_flag(new_dm);
 		}
 
@@ -951,6 +951,10 @@ static DerivedMesh *read_mesh_sample(DerivedMesh *dm, const IObject &iobject, co
 		return new_dm;
 	}
 
+	if (do_normals) {
+		CDDM_calc_normals(dm);
+	}
+
 	return dm;
 }