Depth or stencil comparison function.
| Property | Description | 
|---|---|
| Disabled | Depth or stencil test is disabled. | 
| Never | Never pass depth or stencil test. | 
| Less | Pass depth or stencil test when new value is less than current value. | 
| Equal | Pass depth or stencil test when values are equal. | 
| LessEqual | Pass depth or stencil test when new value is less or equal than current value. | 
| Greater | Pass depth or stencil test when new value is greater than current value. | 
| NotEqual | Pass depth or stencil test when values are different. | 
| GreaterEqual | Pass depth or stencil test when new value is greater or equal than current value. | 
| Always | Always pass depth or stencil test. |