Revert "Workaround for face transparency flag flip"

This reverts commit e99813a.

Author: dcwhite

src/Modules/Visualization/ShowField.cc

@@ -147,7 +147,7 @@ RenderState ShowFieldModule::getFaceRenderState(
   RenderState renState;
 
   renState.set(RenderState::IS_ON, state->getValue(ShowFieldModule::ShowFaces).toBool());
-  renState.set(RenderState::USE_TRANSPARENCY, !state->getValue(ShowFieldModule::FaceTransparency).toBool());
+  renState.set(RenderState::USE_TRANSPARENCY, state->getValue(ShowFieldModule::FaceTransparency).toBool());
 
   renState.defaultColor = ColorRGB(state->getValue(ShowFieldModule::DefaultMeshColor).toString());