Can Light Mapping Data Be Preserve With Animated Object In Unity

Lighting: Technical information and terminology

Real-time lighting

Real-time Lights are Calorie-free components which have their Manner property set up to Realtime.

Use Realtime mode for Lights that need to change their properties or which are spawned via scripts during gameplay. Unity calculates and updates the lighting of these Lights every frame at run fourth dimension. They can alter in response to actions taken by the player, or events which accept place in the Scene. For example, you lot can fix them to switch on and off (like a flickering light), change their Transforms (similar a torch being carried through a dark room), or change their visual properties, like their colour and intensity.

Real-time Lights illuminate and cast realistic shadows on both static and dynamic GameObjects. They cast shadows up to the Shadow Distance (divers in Edit > Project Settings > Quality).

You lot tin can also combine real-time Lights with Realtime Global Illumination (Realtime GI), so that they contribute indirect lighting to static and dynamic GameObjects.

Using real-fourth dimension lighting with Realtime GI

The combination of real-time lighting with Realtime GI is the most flexible and realistic lighting option in Unity. To enable Realtime GI, open the Lighting window (menu: Window > Lighting > Settings) and tick Realtime Global Illumination.

When Realtime GI is enabled, existent-time Lights contribute indirect lighting into the Scene, every bit well as direct lighting. Apply this combination for calorie-free sources which change slowly and have a high visual affect on your Scene, such as the dominicus moving beyond the sky, or a slowly pulsating light in a closed corridor. You don't need to use Realtime GI for Lights that alter apace, or for special furnishings, because the latency of the system does non get in worth the overhead.

Note that Realtime GI uses significant organisation resources compared to the less complex Baked GI. Global Illumination is managed in Unity by a piece of middleware called Enlighten, which has its own overheads (system memory and CPU cycles). See documentation on Global Illumination for more data.

Realtime GI is suitable for games targeting mid-level to high-terminate PC systems, and games targeting current-gen consoles such as the PS4 and Xbox I. Some loftier-end mobile devices might too be powerful enough to make use of this feature, but you should keep Scenes small and the resolution for real-time calorie-free maps low to conserve system resource.

To disable the effect of Realtime GI on a specific calorie-free, select the Calorie-free GameObject and, in the Light component, gear up the Indirect Multiplier to 0. This means that the Light does not contribute whatever indirect light. To disable Realtime GI altogether, open up the Lighting window (carte: Window > Lighting > Settings) and untick Realtime Global Illumination.

Disadvantages of using real-time lighting with Realtime GI

• Increased memory requirements, due to the additional set of low resolution real-fourth dimension calorie-free maps used to store the existent-fourth dimension indirect bounces computed by the Enlighten lighting system.

• Increased shader calculation requirements, due to sampling of the additional set of existent-time light maps and probes used to store the existent-time indirect bounces computed past the Enlighten lighting system.

• Indirect lighting converges over time, then property changes cannot be too abrupt. Adaptive HDR tone mapping might help you hibernate this; to learn more than, see the Unity Mail Processing Stack (Asset Shop).

Technical details

In the case of existent-time Lights (that is, Light components with their Mode fix to Realtime), the concluding emission (or path segment) from the surface to the Lite is not precomputed. This means that Lights tin motion effectually the Scene, and change visual backdrop like color and intensity. Meet documentation on Using Enlighten in Unity for more information on path segments.

If the Low-cal also casts shadows, both dynamic and static GameObjects in the Scene are rendered into the Light'due south shadow map. This shadow map is sampled by the Fabric Shaders of both static and dynamic GameObjects, so that they bandage real-time shadows on each other. The Shadow Distance (menu: Edit > Project Settings > Quality > Shadows) controls the maximum distance at which shadows outset to fade out and disappear entirely, which in turn affects performance and image quality.

If Realtime GI is not enabled, real-fourth dimension Lights but calculate straight lighting on dynamic and static GameObjects. If Realtime GI is enabled, Unity uses Enlighten to precompute the surface-to-surface calorie-free paths for static GameObjects.

Precomputed Realtime GI mode: Unity only precomputes surface-to-surface information

The final path segment (that is, the segment from the surface to the Calorie-free emitter) is not part of the precomputation. The only data stored is that if the surface is illuminated, and then the following surfaces and probes are likewise illuminated, and the intensities of the diverse illuminations. At that place is a separate set of low-resolution existent-time light maps, which Enlighten iteratively updates on the CPU at run fourth dimension with the information of real-fourth dimension Lights. Because this iterative process is computationally intensive, it is carve up across several frames. In other words, information technology takes a couple of frames until the lite has fully bounced across the static elements in the Scene, and the existent-time light maps and Light Probes have converged to the final outcome.

For Lights with properties that modify slowly (such as a light-emitting sun moving across the heaven), this does not pose a trouble. Nonetheless, for Lights with backdrop that change quickly (such as a flickering lightbulb), the iterative nature of Realtime GI may evidence unsuitable. Fast property changes do non register significantly with the bounced light arrangement, and so there is no indicate in including them in the calculations.

There are several ways to address this trouble. One way is to reduce the real-time light map resolution. Considering this results in less calculation at run fourth dimension, the lighting converges faster. Some other option is to increase the CPU Usage setting for the Realtime GI runtime. By dedicating more CPU time, the runtime converges faster. The tradeoff is of course that other systems receive less CPU time to do their work. Whether this is acceptable depends on each individual project. Annotation that as this is a per-Scene setting, you can dedicate more or less CPU time based on the complexity of each private Scene in the project.

Even though Realtime GI is enabled on a per-Scene basis for all real-time Lights, information technology is still possible to foreclose individual real-time Lights from being considered by Realtime GI. To achieve this, set up the Calorie-free component's Manner to Realtime and its indirect multiplier to 0, removing all indirect calorie-free contributions.

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• 2017–06–08 Page published with limited editorial review - Leave page feedback

• Light Modes added in five.vi

Lighting: Technical information and terminology

Source: https://docs.unity3d.com/560/Documentation/Manual/LightMode-Realtime.html

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