Abstract: Scenes of objects, such as models in three-dimensional environments and user interface elements in window-based computing environments, are often rendered with shadows cast by a first object on a second object based on a light source. Full graphics engines often produce rich and high-fidelity shadows but involve extensive computation that may be unsuitable for some lower-powered devices. Simple shadowing techniques, such as drop shadows, may be rendered with modest computational processing, but only within significant restrictions and with poor fidelity. Presented herein is a shadow rendering technique that involves identifying a silhouette cast by an object due to a light source and applying a geometric transform, based upon the positions of the objects and the light source within the scene. The shadows may further include variations for opacity and/or edge blurring, reflecting distances between the light source and the objects, and colored shadows that exhibit translucency as a stained-glass effect.

Abstract: A scene may be rendered as objects that are lit by various light sources. A scene designer may arrange the scene to create particular lighting effects when viewed from an initial perspective, such as gloss, translucency, and iridescence, and may choose lighting effects to create a desired aesthetic tone and/or highlighting within the scene. However, rendering the scene from a different perspective may alter the lighting effects (e.g., losing or misplacing desired lighting effects, and/or creating new and undesirable lighting effects, such as glare). Instead, when the scene is rendered from the initial perspective, the lighting effects created therein may be stored with the scene representation of the scene. A second rendering of the scene from a different perspective may reapply the stored lighting effects to the lit objects, thereby maintaining the lighting effects and the intent of the designer in the presentation of the scene from a different perspective.

Abstract: A scene may be rendered as objects that are lit by various light sources. A scene designer may arrange the scene to create particular lighting effects when viewed from an initial perspective, such as gloss, translucency, and iridescence, and may choose lighting effects to create a desired aesthetic tone and/or highlighting within the scene. However, rendering the scene from a different perspective may alter the lighting effects (e.g., losing or misplacing desired lighting effects, and/or creating new and undesirable lighting effects, such as glare). Instead, when the scene is rendered from the initial perspective, the lighting effects created therein may be stored with the scene representation of the scene. A second rendering of the scene from a different perspective may reapply the stored lighting effects to the lit objects, thereby maintaining the lighting effects and the intent of the designer in the presentation of the scene from a different perspective.