Strange artifacts in mesh These beakers look fine in wire frame but they show odd shadows in solid view that persist when the scene is rendered. How do I fix this?



.blend file: https://drive.google.com/file/d/0BxQSzlIf4gF6M1VlSGZzSUl5SXc/view?usp=sharing
It looks like you have duplicated the mesh without moving it. Try selecting all vertices in edit mode and pressing W to bring up the specials menu and selecting remove doubles. You may also want to recalculate your normals after doing this from the shading/UVs tab on the toolshelf of the 3D View.