Index: trunk/dbconfig/warp.md
===================================================================
--- trunk/dbconfig/warp.md	(revision 28375)
+++ trunk/dbconfig/warp.md	(revision 34731)
@@ -74,4 +74,5 @@
     maskfrac_magic  F32     0.0
     maskfrac_advisory F32   0.0
+    background_model  S16   0
 END