Sprite normals disappear on play

Hey everyone. I am using the Standard Material (rendering mode Fade, Unity 5.5) as a material for my Sprites with a normal map applied to it. The normals seem to work in the Scene & Game viewports until I hit Play when they stop working and I get a flat unlit type of sprite.

So, before Play (Scene viewport on the left, Game viewport on the right):
86553-sprite-normals.png

After Play:
86554-sprite-normals-after-play.png

Any ideas why this is happening?

Cheers,
Aziz

It seems I had FOG on. Problem solved. :smiley: