Falconer, I made no edits to any of my posts in this thread except the one with the power description and that was to correct the bolding I tried inside a code tag block.

I always treated critters with the Dual Nature power as having a visual overlay for the Astral just like having Thermographic was a visual overlay for normal vision. That makes for a good explanation of it.

Then, in those cases where another Power / Ability made you dual natured, you'd suffer penalties as appropriate (Astral Perception giving a -2 dice for Physical Actions).