T55333 Workbench: Cavity Shader

A cavity shader based on SSAO. Works on all workbench deferred passes.

Per 3d viewport the cavity shader options can be set as different
shading needed different options. Some global options are in the
Viewport Display of the scene like num samples and distance.

Experimental: Naming of Ridges and Valleys

release/scripts/startup/bl_ui/properties_scene.py

@@ -476,6 +476,24 @@ class SCENE_PT_viewport_display(SceneButtonsPanel, Panel):
         col.prop(scene.display, "shadow_shift")
 
 
+class SCENE_PT_viewport_display_ssao(SceneButtonsPanel, Panel):
+    bl_label = "Viewport Display SSAO"
+    bl_parent_id = "SCENE_PT_viewport_display"
+
+    @classmethod
+    def poll(cls, context):
+        return True
+
+    def draw(self, context):
+        layout = self.layout
+        layout.use_property_split = True
+        scene = context.scene
+        col = layout.column()
+        col.prop(scene.display, "matcap_ssao_samples")
+        col.prop(scene.display, "matcap_ssao_distance")
+        col.prop(scene.display, "matcap_ssao_attenuation")
+
+
 class SCENE_PT_custom_props(SceneButtonsPanel, PropertyPanel, Panel):
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_CLAY', 'BLENDER_EEVEE'}
     _context_path = "scene"
@@ -492,6 +510,7 @@ classes = (
     SCENE_PT_color_management,
     SCENE_PT_color_management_curves,
     SCENE_PT_viewport_display,
+    SCENE_PT_viewport_display_ssao,
     SCENE_PT_audio,
     SCENE_PT_physics,
     SCENE_PT_rigid_body_world,