Cycles: Use lower progressive update timeout for preview rendering

This ways previews are refreshing with the same ratio as job was expecting
this to happen, giving more instant feedback on the changes.

1 files changed, 7 insertions, 0 deletions

diff --git a/intern/cycles/blender/blender_sync.cpp b/intern/cycles/blender/blender_sync.cpp
index fe33ccbc6c1..985a3cd3d5a 100644
--- a/intern/cycles/blender/blender_sync.cpp
+++ b/intern/cycles/blender/blender_sync.cpp
@@ -554,6 +554,13 @@ SessionParams BlenderSync::get_session_params(BL::RenderEngine b_engine,
 		                               b_engine.support_display_space_shader(b_scene);
 	}
 
+	if(b_engine.is_preview()) {
+		/* For preview rendering we're using same timeout as
+		 * blender's job update.
+		 */
+		params.progressive_update_timeout = 0.1;
+	}
+
 	return params;
 }