Ambient Occlusion split up into:

Ambient occlusion: multiplied with direct lighting by default, add
is also still available and more blending methods might be added if
they are useful. This is fundamentally a non physical effect.

Environment lighting: always added as you would expect (though you can
subtract by specifying negative energy). This can be just white or take
colors or textures from the world.

Indirect lighting: only supported for AAO at the moment (and is still
too approximate), and also is always added. A factor is available to
specify how much is added, though value 1.0 is correct.

Also:
* Material ambient value now defaults to 1.0.
* Added Environment, Indirect and Emit pass.
* "Both" blending method is no longer available.
* Attenuation, sampling parameters are still shared, some could be split
  up, though if they are different this would affect performance.

1 files changed, 30 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index c3457adc288..84b27ad44eb 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -10604,6 +10604,36 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
 		}
 	}
 	
+	if (main->versionfile < 250 || (main->versionfile == 250 && main->subversionfile < 15)) {
+		World *wo;
+		Material *ma;
+
+		/* ambient default from 0.5f to 1.0f */
+		for(ma= main->mat.first; ma; ma=ma->id.next)
+			ma->amb *= 2.0f;
+
+		for(wo= main->world.first; wo; wo=wo->id.next) {
+			/* ao splitting into ao/env/indirect */
+			wo->ao_env_energy= wo->aoenergy;
+			wo->aoenergy= 1.0f;
+
+			if(wo->ao_indirect_bounces == 0)
+				wo->ao_indirect_bounces= 1;
+			else
+				wo->mode |= WO_INDIRECT_LIGHT;
+
+			if(wo->aomix == WO_AOSUB)
+				wo->ao_env_energy= -wo->ao_env_energy;
+			else if(wo->aomix == WO_AOADDSUB)
+				wo->mode |= WO_AMB_OCC;
+
+			wo->aomix= WO_AOMUL;
+
+			/* ambient default from 0.5f to 1.0f */
+			mul_v3_fl(&wo->ambr, 0.5f);
+			wo->ao_env_energy *= 0.5f;
+		}
+	}
 	
 	/* put 2.50 compatibility code here until next subversion bump */
 	//{