Windows 10 64-bit, Nvidia gtx 570 (render), Nvidia gt 610 (display)
Broken: 2.77a, c0943ba (latest 64-bit build)
Short description of error
In Cycles, when the 'Viewport Alpha' in the material's 'Settings' panel is set to 'Alpha Blend', 'Alpha Sort' or 'Alpha Clip' and the material has a 'Transparent' node connected and 'Transparency' is checked in the Object's 'Display' tab and the viewport shading is 'Material', the selected object appears triangulated.
Unchecking the 'Transparency' setting on the Object's 'Display' tab returns the mesh back to normal.
Exact steps for others to reproduce the error
- Toggle 'Transparency' on and off in the Object's 'Display' panel.