1 | initial version |

There is a ray-tracer built into Sage called Tachyon. In the example from your previous question, try:

```
sage: point3d(L, viewer='tachyon')
```

Here is the section of the Sage manual: Tachyon

2 | No.2 Revision |

There is a ray-tracer built into Sage called Tachyon. In the example from your previous question, try:

```
sage: L = [ (1, 1, 1), (1, 5, 7), (8.8, 0, 3), (7.5, 1.91, 11.8), (0, 0, 0) ]
sage: point3d(L, viewer='tachyon')
```

or..

```
sage: plot3d(x^2-y^2, (x,-2,2), (y,-2,2), viewer='tachyon')
```

Here is the section of the Sage manual: Tachyon

3 | No.3 Revision |

There is a ray-tracer built into Sage called Tachyon. In the example from your previous question, try:

```
sage: L = [ (1, 1, 1), (1, 5, 7), (8.8, 0, 3), (7.5, 1.91, 11.8), (0, 0, 0) ]
sage: point3d(L, viewer='tachyon')
```

or..

```
sage: x,y=var('x,y')
sage: plot3d(x^2-y^2, (x,-2,2), (y,-2,2), viewer='tachyon')
```

Here is the section of the Sage manual: Tachyon

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