| The surfaces and arrises are regular and well-finished. |
| After this, the arrises may again be planed until it has 16 and then 32 sides. |
| On entering the church, the vault is worthy of admiration: not large yet well-proportioned, fortified by arrises resting on pillars making up five sides, each of which has its own window. |
| Afterwards it arrises the product on a plate where the product dries from oil. |
| Much skill and care is required to retain the arrises sharp and the curved members of accurate and proportionate outline. |
| The former one generally uses some prior knowledge such as scene, object, illumination condition, and so on, through which can match the arrises, lines, angles of the moving objects in order to detect shadows. |
