Approximate Ambient Occlusion

=============================

A new approximate ambient occlusion method has been added, next to the
existing one based on raytracing. This method is specifically targetted
at use in animations, since it is inherently noise free, and so will
not flicker across frames.

http://www.blender.org/development/current-projects/changes-since-244/approximate-ambient-occlusion/
http://peach.blender.org/index.php/approximate-ambient-occlusion/

Further improvements are still needed, but it can be tested already. There
are still a number of known issues:

- Bias errors on backfaces.
- For performance, instanced object do not occlude currently.
- Sky textures don't work well, the derivatives for texture evaluation
  are not correct.
- Multiple passes do not work entirely correct (they are not accurate
  to begin with, but could be better).

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index 6a2e3aa481a..5712f8f03fc 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -6698,6 +6698,7 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
 		Lamp *la;
 		Material *ma;
 		ParticleSettings *part;
+		World *wrld;
 		Mesh *me;
 		
 		/* unless the file was created 2.44.3 but not 2.45, update the constraints */
@@ -6878,6 +6879,11 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
 			}
 		}
 
+		for(wrld=main->world.first; wrld; wrld= wrld->id.next) {
+			if(wrld->ao_approx_error == 0.0f)
+				wrld->ao_approx_error= 0.25f;
+		}
+
 		if (main->versionfile < 245 || main->subversionfile < 12)
 		{
 			/* initialize skeleton generation toolsettings */