Bake PBR is a special material based on PBR material, which basically inherits the characteristics of PBR, but does not accept the influence of direct light. Instead, it can set a baked light map, which is sampled based on UV2, so that it can support static batching of objects in the scene. At the same time, in order to compensate for the darker problem caused by the loss of direct light, it supports the adjustment of exposure parameters and use ACES toneMapping to correct the highlights.
- shadowTexture: Bake shadow map
- ShadowIntensity: If not set shadowTexture, the real-time shadow will work as the transparent shadow, which intensity can be adjusted.
- Exposure: exposure to adjust the brightness of model, which will be adjusted by ACES toneMapping automatically.
The Bake shadow map is the core attribute of this material, which enables the scene to reduce the impact of direct light on performance while ensuring the effect of the picture. If there is UV-2 information in the model, this ShadowMap will automatically sample according to UV-2, otherwise it will directly use UV-1 for sampling. Such a feature is intended to support static batching of models of a scene. But because of this automated processing, special attention needs to be paid to the UV data, so as not to cause other problems.
