Automatic Exposure
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Summary
Exposure is a linear scaling operation performed on a scene-referred
image before tone mapping to fine-tune the brightness or darkness of the image. URP allows for manual adjustment of exposure of the final render using Color Adjustment post-processing effect depending on the lighting conditions and brightness of the scene. Automatic exposure as a post-processing effect will allow for dynamic adjustment of a rendered image's exposure according to the range of brightness levels available on the image.
Intended Outcome/Use Case
The human eye can function in both very dark and very bright areas. However, the eye can only sense a contrast ratio of roughly one-millionth of the total range at any single moment. The eye functions well in multiple light levels by adapting and redefining what is black. Similarly, Automatic Exposure dynamically adjusts the exposure of rendered images according to the range of brightness levels within the image.
With this feature, you will be able to set up environments that vary dramatically in lighting conditions without the need to make adjustments to the exposure based on predefined values when the camera moves from one area to another.
These adjustments take place gradually, which means that the user can be briefly dazzled by a bright outdoor light when they emerge from a dark area. Equally, when moving from a bright area to a dark one, the camera takes a moment to adjust, mimicking the human eye behavior and adaptation concept.