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I'm working on a model for an urban project that has two adjacent buildings that will definitely have a shading impact on the walls and glazing of my project. I'd like to take this into account for my proposed model so that the recommendations I'm providing will more accurately represent the actual conditions (i.e. appropriate SHGC to save energy, not just get LEED points). It looks like I am technically allowed (even encouraged), but I'm not sure how to actually do that and still follow the rules for the baseline model..

Per 90.1-2010 App. G, Table G3.1.14.a Shading by adjacent structures and terrain - Paraphrasing, it says "model adjacent structures that will shade your project." It also instructs for the baseline to be "same as proposed design." Okay, great. This means I modeled the adjacent building for the proposed, and leave it in the baseline model.

However, G3.1.a for the baseline building says, "the building shall be modeled so it does not shade itself."

The question is, how the heck can I model shading by an adjacent structure while NOT modeling the building's self shading?

My model is in IES-VE so VE-specific solutions are welcome, but I feel like this is a universal issue, unless a software tool can differentiate between shading by "self" and shading by "other."