Sorry if this is a dumb question. I am trying to understand a video tutorial on render nodes. At 16m 50s it is explained that when a mix node is set to subtract the order of the noodle inputs matters. But for multiply it does not matter - for mathematic reasons. See video below.
This makes sense to me. So, when I set it to “Add” I would expect the order not to matter. But in reality I get different results for some reason. See video below.
I don’t understand why this happens.