doc: clarify which features that are not impossible to implement (#488)

Author: sindharta

com.unity.toonshader/Documentation~/FeatureModel_en.md

@@ -7,8 +7,8 @@
 | With Advanced Control Map 	                                                                                                                                                                               | OK 	                | OK	    | OK 	                |  	|
 | ***2. Shader Settings*** 	                                                                                                                                                                                | 	                   | 	      | 	                   |  	|
 | Culling  	                                                                                                                                                                                                | OK 	                | OK 	   | OK 	                |  	|
-| Stencil  	                                                                                                                                                                                                | OK 	                | OK 	   | N.A. 	              |  	|
-| Stencil Value 	                                                                                                                                                                                           | OK 	                | OK 	   | N.A. 	              |  	|
+| Stencil  	                                                                                                                                                                                                | OK 	                | OK 	   | NO 	                |  	|
+| Stencil Value 	                                                                                                                                                                                           | OK 	                | OK 	   | NO 	                |  	|
 | Clipping 	                                                                                                                                                                                                | OK 	                | OK 	   | OK	                 |  	|
 | Clipping Mask                                                                                                                                                                                             | OK 	                | OK	    | OK 	                |  	|
 | Invert  Clipping Mask 	                                                                                                                                                                                   | OK 	                | OK 	   | OK 	                |  	|
@@ -71,9 +71,9 @@
 | ***10. Scene Light Effectiveness Settings*** 	                                                                                                                                                            | 	                   | 	      | 	                   |  	|
  Activate/Deactive LightColor Effectiveness to each color:<br> Base Color,1st Shading Color, 2nd Shading Color, Highlight, Rim Light, Inverted Light Direction Rim Light, MatCap, Angel Ring, or Outline 	 | OK 	                | OK 	   | OK 	                |  	|
 | ***11. Metaverse Settings*** 	                                                                                                                                                                            | 	                   | 	      | 	                   |  	|
-| Metaverse Light 	                                                                                                                                                                                         | OK 	                | OK 	   | N.A. 	              |  	|
-| Metaverse Light Intensity	                                                                                                                                                                                | OK 	                | OK 	   | N.A. 	              |  	|
-| Metaverse Light Direction	                                                                                                                                                                                | OK 	                | OK 	   | N.A. 	              |  	|
+| Metaverse Light 	                                                                                                                                                                                         | OK 	                | OK 	   | NO 	                |  	|
+| Metaverse Light Intensity	                                                                                                                                                                                | OK 	                | OK 	   | NO 	                |  	|
+| Metaverse Light Direction	                                                                                                                                                                                | OK 	                | OK 	   | NO 	              |  	|
 | ***12. Outline Settings*** 	                                                                                                                                                                              | 	                   | 	      | 	                   |  	|
 | Outline Mode 	                                                                                                                                                                                            | OK 	                | OK 	   | OK 	                |  	|
 | Outline Width 	                                                                                                                                                                                           | OK 	                | OK 	   | OK 	                |  	|
@@ -96,9 +96,9 @@
 | Substitute for directional light 	                                                                                                                                                                        | N.A.	               | N.A.	  | OK	                 | To get around the limitation that multiple directional lights can't cast shadows at the same time. |
 | ***17. Rendering Paths*** 	                                                                                                                                                                               | 	                   | 	      | 	                   |  	|
 | Forward 	                                                                                                                                                                                                 | OK	                 | OK	    | OK	                 | |
-| Forward+ 	                                                                                                                                                                                                 | N/A	                 | OK	    | N/A	                 | |
+| Forward+ 	                                                                                                                                                                                                 | N/A	                 | OK	    | N/A	                | |
 | Deferred 	                                                                                                                                                                                                | NO	                 | NO	    | OK	                 | |
-| Deferred+ 	                                                                                                                                                               | N/A	             | NO	    | N/A	               | |
+| Deferred+ 	                                                                                                                                                               | N/A	             | NO	    | N/A	                | |