| Conventional backward ray tracing can generate beautiful images. However, in scenes where a light indirectly illuminates an object, such as by bouncing off or passing through another object, this method fails. Lack of indirect illumination contributions make an image look unrealistic, such as dark shadows beneath a transparent object rather than lighting patterns or caustics.; There has been much research in improving ray tracing to render indirect light contributions, although much has dealt with reflected light rather than refracted light, or developing methods that restrict the types of objects that can be traced Some of the techniques that work with refraction produce more realistic images than other methods, and many require enormous amounts of time and resources to render.; Methods for rendering indirect refracted light contributions are examined and implemented for this thesis. Realism, rendering time, complexity, and restrictions are compared to propose a fast, robust method for rendering realistic scenes containing refractive objects. |
