Fix #35723: cycles motion blur rendering issue after recent optimizations to skip

some unneeded object syncing.

1 files changed, 6 insertions, 2 deletions

diff --git a/intern/cycles/blender/blender_session.cpp b/intern/cycles/blender/blender_session.cpp
index c981e379333..ecdc631e39a 100644
--- a/intern/cycles/blender/blender_session.cpp
+++ b/intern/cycles/blender/blender_session.cpp
@@ -102,12 +102,16 @@ void BlenderSession::create_session()
 	/* create sync */
 	sync = new BlenderSync(b_engine, b_data, b_scene, scene, !background, session->progress, session_params.device.type == DEVICE_CPU);
 
-	/* for final render we will do data sync per render layer */
 	if(b_v3d) {
+		/* full data sync */
 		sync->sync_data(b_v3d, b_engine.camera_override());
 		sync->sync_view(b_v3d, b_rv3d, width, height);
 	}
 	else {
+		/* for final render we will do full data sync per render layer, only
+		 * do some basic syncing here, no objects or materials for speed */
+		sync->sync_render_layers(b_v3d, NULL);
+		sync->sync_integrator();
 		sync->sync_camera(b_render, b_engine.camera_override(), width, height);
 	}
 
@@ -373,8 +377,8 @@ void BlenderSession::render()
 		scene->integrator->tag_update(scene);
 
 		/* update scene */
-		sync->sync_data(b_v3d, b_engine.camera_override(), b_rlay_name.c_str());
 		sync->sync_camera(b_render, b_engine.camera_override(), width, height);
+		sync->sync_data(b_v3d, b_engine.camera_override(), b_rlay_name.c_str());
 
 		/* update number of samples per layer */
 		int samples = sync->get_layer_samples();