added poor docstrings

pype/plugins/tvpaint/create/create_beauty.py

@@ -3,6 +3,7 @@ from avalon.tvpaint import pipeline, lib
 
 
 class CreateBeauty(pipeline.TVPaintCreator):
+    """Mark layer group as one instance."""
     name = "beauty"
     label = "Beauty"
     family = "renderLayer"

pype/plugins/tvpaint/create/create_render_pass.py

@@ -4,6 +4,11 @@ from avalon.tvpaint import pipeline, lib
 
 
 class CreateRenderPass(pipeline.TVPaintCreator):
+    """Render pass is combination of one or more layers from same group.
+
+    Requirement to create Render Pass is to have already created beauty
+    instance. Beauty instance is used as base for subset name.
+    """
     name = "render_pass"
     label = "Render Pass"
     family = "renderPass"

pype/plugins/tvpaint/create/create_review.py

@@ -2,6 +2,7 @@ from avalon.tvpaint import pipeline
 
 
 class CreateReview(pipeline.TVPaintCreator):
+    """Review for global review of all layers."""
     name = "review"
     label = "Review"
     family = "review"