Cycles:

* Increase the maximum amount of closures per shader from 16 to 64, so more complex closure trees can be rendered.

I measured performance on CPU and GPU (Geforce 540M) and couldn't find a performance impact, but if someone encounters a noticeable impact on his system, please report.

intern/cycles/bvh/bvh.h

@@ -46,7 +46,7 @@ class Progress;
 
 struct PackedBVH {
 	/* BVH nodes storage, one node is 4x int4, and contains two bounding boxes,
-	 * and child, triangle or object indexes dependening on the node type */
+	 * and child, triangle or object indexes depending on the node type */
 	array<int4> nodes; 
 	/* object index to BVH node index mapping for instances */
 	array<int> object_node; 

intern/cycles/kernel/kernel_types.h

@@ -436,7 +436,7 @@ typedef enum AttributeStandard {
 
 /* Closure data */
 
-#define MAX_CLOSURE 16
+#define MAX_CLOSURE 64
 
 typedef struct ShaderClosure {
 	ClosureType type;