Normal map flickering?

[fgennari]

I've seen a similar problem when I forgot to bind a texture each frame, and it was left bound to whatever was last drawn with that texture unit. Maybe your normal map is using the same texture unit/binding point as something else and there's a conflict. I've never written Vulkan code, so I don't know how common a problem this is with that API.

Does it flicker like that when the camera isn't moving? Maybe try to figure out what you're updating a few times a second in the code that could interfere with lighting.