Homagah it all renders I think.

lib/jekyll/renderer.rb

@@ -31,6 +31,7 @@ module Jekyll
       payload = Utils.deep_merge_hashes({
         "page" => document.to_liquid
       }, site.site_payload)
+
       info    = {
         filters:   [Jekyll::Filters],
         registers: { :site => site, :page => payload['page'] }
@@ -117,7 +118,7 @@ module Jekyll
           File.join(site.config['layouts'], layout.name)
         )
 
-        if layout = layouts[layout.data["layout"]]
+        if layout = site.layouts[layout.data["layout"]]
           if used.include?(layout)
             layout = nil # avoid recursive chain
           else

lib/jekyll/site.rb

@@ -92,7 +92,7 @@ module Jekyll
       end
     end
 
-    def render
+    def to_render
       config['render'] || Array.new
     end
 
@@ -197,9 +197,7 @@ module Jekyll
     #
     # Returns nothing.
     def read_collections
-      if collections
-        collections.each { |_, collection| collection.read }
-      end
+      collections.each { |_, collection| collection.read }
     end
 
     # Run each of the Generators.
@@ -217,11 +215,9 @@ module Jekyll
     def render
       relative_permalinks_deprecation_method
 
-      if collections
-        collections.each do |label, collection|
-          collection.docs.each do |document|
-            document.output = Jekyll::Renderer.new(self, document).run
-          end
+      collections.each do |label, collection|
+        collection.docs.each do |document|
+          document.output = Jekyll::Renderer.new(self, document).run
         end
       end
 
@@ -389,11 +385,9 @@ module Jekyll
 
     def documents
       docs = Set.new
-      if collections
-        collections.each do |label, coll|
-          if render.include?(label)
-            docs = docs.merge(coll.docs)
-          end
+      collections.each do |label, coll|
+        if to_render.include?(label)
+          docs = docs.merge(coll.docs)
         end
       end
       docs