Question Problem Transforming Normals out of View Space

I'm trying to edit normals in view space before converting to tangent space. As you can see from the image- the result of the Transform node doesn't match the result coming out of the Normal Vector node. Infact- I can't transform from view space into world or object space correctly either! Any idea what's going on here?

 

Normals are ... weird. They're not handled like "a direction" is for ... reasons. They instead need to use the transpose inverse transform of whatever matrix would normally be used for transforming any other direction.

The Transform nodes handle this properly ... at least when going from World to Tangent space. It looks like it's totally broken when going from View to Tangent space though! The work around is to do the View to World transform yourself, like this:

 

Thank you so much Bgolus! You're a saint.