Black Outline and Visible Faces in Cycles Render Previewing in Eevee looks fine, but when I switch to Cycles, this occurs:


Also comes as a white grain on the side opposite from the lightsource.


As you can see, parts become darker; there's black, ink-like stuff on the model (I thought it was AO at first and disabled it, but it's still there); and the faces of the model can be seen, especially along the chest and R-Leg.

The material setup is just the default BSDF with a Base Color (.jpg) and Normal map (.png) (fed through Mormal Map node).

Neither have been exported as an image, just rendered in the viewport.

Any advice appreciated - first day on Blender (well, near enough)

-edit-
Looks like problem with normal maps. Try switching to non-color color space in texture node and use bump node instead of connecting normal map directly.