Setting Perspective Camera before model is loaded

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I’ve looked as the description here to see if it could help:

How-To: Set View Behavior Prior to Model Load

As a developer, I’d like to learn how-to load a model with specific view behaviors already set without seeing a noticeable transition when the model is loading . Introduction User experience can suffer if we first load a model with the default settings, then change those view settings to our desired effect after the model is loaded. As a user, I want to be able to set the view settings (i.e. projection mode, visibility, camera orientation, etc) before I see the model loaded into the scene. Ins…

I thought I fixed it using this approach, but I still get a “jump” between Orthographic and Perspective projection.
It is almost invisible on small models, but quite annoying on larger model.