add subsurf limits, in RNA, there were none, but subsurf would assert at 29.

Checked and subsurf level 11 gives over 3 million faces from a single triangle. So use this as a limit.

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_modifier.c b/source/blender/makesrna/intern/rna_modifier.c
index ef997ab1fd9..29eb967e3ce 100644
--- a/source/blender/makesrna/intern/rna_modifier.c
+++ b/source/blender/makesrna/intern/rna_modifier.c
@@ -793,14 +793,17 @@ static void rna_def_modifier_subsurf(BlenderRNA *brna)
 
 	rna_def_property_subdivision_common(srna, "subdivType");
 
+	/* see CCGSUBSURF_LEVEL_MAX for max limit */
 	prop = RNA_def_property(srna, "levels", PROP_INT, PROP_UNSIGNED);
 	RNA_def_property_int_sdna(prop, NULL, "levels");
+	RNA_def_property_range(prop, 0, 11);
 	RNA_def_property_ui_range(prop, 0, 6, 1, -1);
 	RNA_def_property_ui_text(prop, "Levels", "Number of subdivisions to perform");
 	RNA_def_property_update(prop, 0, "rna_Modifier_update");
 
 	prop = RNA_def_property(srna, "render_levels", PROP_INT, PROP_UNSIGNED);
 	RNA_def_property_int_sdna(prop, NULL, "renderLevels");
+	RNA_def_property_range(prop, 0, 11);
 	RNA_def_property_ui_range(prop, 0, 6, 1, -1);
 	RNA_def_property_ui_text(prop, "Render Levels", "Number of subdivisions to perform when rendering");