Occurs on 2 systems (both Windows 8.1). One system has a Geforce GTX745 card, and the other has an Intel integrated HD 4600 graphics.
Broken: Bug occurs on 2.73a and 2.74RC2
Worked: works on 2.69
When a duplicated mesh object has been mirrored (with the object shading is set to smooth and auto-smooth enabled), the Blender Internal renderer renders the object completely black.
Exact steps for others to reproduce the error
- Add a UV Sphere and add a new material
- Set shading to smooth
- Enable auto smooth
- Create a linked duplicate (Alt-D) and place it beside the original sphere
- Mirror the duplicate about an axis (For example: Object > Mirror > X Global)
- Press F12 to render
The original object renders normally, but the duplicate renders as black. Even if the original object is deleted, and then the normals are recalculated on the second (remaining) object, it still renders as black. This bug appears to have similar symptoms as T40014 and T41079, which were previously fixed.