diff --git a/scripts/addons/cam/simulation.py b/scripts/addons/cam/simulation.py
index d5c31ecd..0860c2a8 100644
--- a/scripts/addons/cam/simulation.py
+++ b/scripts/addons/cam/simulation.py
@@ -109,8 +109,8 @@ async def doSimulation(name, operations):
     """
     for o in operations:
         getOperationSources(o)
-    limits = getBoundsMultiple(
-        operations)  # this is here because some background computed operations still didn't have bounds data
+        o.material.estimate_from_model= True
+    limits = getBoundsMultiple(operations)  # this is here because some background computed operations still didn't have bounds data
     i = await generateSimulationImage(operations, limits)
 #    cp = getCachePath(operations[0])[:-len(operations[0].name)] + name
     cp = getSimulationPath()+name