fix translucency model using new permittance setting

plugins/ImageReader/ConfigUI.qml

@@ -165,6 +165,29 @@ UM.Dialog
             }
         }
 
+        UM.TooltipArea {
+            Layout.fillWidth:true
+            height: childrenRect.height
+            text: catalog.i18nc("@info:tooltip","The percentage of light penetrating a print with a thickness of 1 millimeter.")
+            Row {
+                width: parent.width
+
+                Label {
+                    text: catalog.i18nc("@action:label", "1mm Transmittance (%)")
+                    width: 150 * screenScaleFactor
+                    anchors.verticalCenter: parent.verticalCenter
+                }
+                TextField {
+                    id: transmittance
+                    objectName: "Transmittance"
+                    focus: true
+                    validator: RegExpValidator {regExp: /^[1-9]\d{0,2}([\,|\.]\d*)?$/}
+                    width: 180 * screenScaleFactor
+                    onTextChanged: { manager.onTransmittanceChanged(text) }
+                }
+            }
+        }
+
         UM.TooltipArea {
             Layout.fillWidth:true
             height: childrenRect.height