Mirror Modifier making ugly smoothing on mirrored faces The model is vivisected right down the middle along the z axis. The right leg is rendering funny and I assume if I can get that fixed everything else will fall into place. I tried flipping normals, changing shading types - can't think of anything else to do.

.blend FIle
You have custom normals on this model, the normals for some reason now point in strange directions.

In the mesh properties navigate to "Geometry Data" and press "Clear Custom Split Normal Data".