Glossines control when using environment map

I have an outdoor skybox, but I want me reflections on metal objects to be from the inside of the model, so I rendered out a spheremap in order have the metal reflext back the right hue.

The only problem I’m running into now, is it seems like whenever I populate the Sphere Map slot in the Environment Section of the material editor, it seems like I lose all control of glossiness on the metal parts of my material. It will only respond to changes in “Reflectivity” for the environment map. Is the intended behavior? When using the regular skybox, the metal portions of my materials visually change when adjusting glossiness.

Update:

Looks like it was related to using a sphere map instead of a cube map. Rendering out a cubemap restored the finer controls of glossiness.

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