| 摘要 |
When rendering a scene for output in which a first at least partially transparent object 41 and a second object 71 are present in the scene, the second object 71 being at least partially behind and/or within the first object 41, for at least one sampling position 82 on a surface of the first object 41, the colour to be used to represent the part of the second object 71 that will be visible through the first object 41 at the sampling position is determined. This is done using a view vector 84 from a main viewpoint position 74 for the scene to determine a refracted view vector 83 for the sampling position 82, using the refracted view vector 83 to determine texture coordinates to be used to sample a graphics texture that represents the second object 71, and using the determined texture coordinates to sample the graphics texture to determine a colour for the sampling position 82 to be used to representthe part of the second object 71 that will be visible through the first object 41 at the sampling position 82. |
