Version: 2019.4
The Progressive GPU Lightmapper (preview)
ライトマッピング - はじめに

Lightmapping using Enlighten (deprecated)

Enlighten is deprecated, and will soon be removed. For more information, see the Unity blog. As an alternative lightmapper, use the Progressive GPU Lightmapper (Preview) or Progressive CPU Lightmapper.

Unity’s Enlighten lightmapper relies on precomputed real-time GI to generate indirect lighting. This can be an advantage, because changing the lighting can produce new lightmaps fairly quickly. However, it can also be a disadvantage compared to progressive lightmapping, because it imposes UV layout limitations even if you are only interested in using it for baked lighting.

Render pipeline support

  • The Built-in Render Pipeline supports the Englighten lightmapper.
  • The Universal Render Pipeline (URP) does not support the Englighten lightmapper.
  • The High Definition Render Pipeline (HDRP) does not support the Englighten lightmapper.

Using the Enlighten lightmapper

To use the Enlighten Lightmapper, go to Window > Rendering > Lighting Settings, navigate to Lightmapping Settings, and set Lightmapper to Enlighten.

You can perform many of the functions available in this window via scripts, using the LightmapEditorSettings and Lightmapping APIs.

プロパティー 説明
Lightmapper Use this to specify which internal lighting calculation software to use to calculate lightmaps in the Scene. The options are:

Progressive CPU
Progressive GPU
Enlighten (deprecated)

The default value is Progressive CPU.
Final Gather Final Gather is only available if Lightmapper is set to Enlighten.

Enable this if you want the lightmapper to calculate the final light bounce of the global illumination at the same resolution as the baked lightmap. This improves visual quality, but requires additional time to bake the lighting.
Ray Count Specify the number of rays the lightmapper emits for every final gather point.
Denoising Enable this to add a denoising filter to the final gather output.
Indirect Resolution Use this to specify the number of samples the lightmapper uses for indirect lighting calculations. Higher values can improve the quality of the lightmaps, but increase the time it takes to bake them.
Lightmap Resolution Use this to specify the number of texels per unit to use for lightmaps. Increasing this value improves lightmap quality, but also increases bake times. Note that doubling this value causes the number of texels to quadruple (because the value refers to both the height and width of the lightmap).
Lightmap Padding Use this to specify the separation (in texel units) between separate shapes in the baked lightmap. The default value is 2.
Lightmap Size The size (in pixels) of the full lightmap texture, which incorporates separate regions for the individual GameObject textures. The default value is 1024.
Compress Lightmaps 圧縮ライトマップは、必要な保存スペースが少なく済みます。しかし、圧縮処理によって、テクスチャに不要な視覚的エフェクトが発生する場合があります。このチェックボックスを有効にすると、ライトマップを圧縮します。無効にすると、圧縮しません。デフォルトではチェックボックスは有効になっています。
Ambient Occlusion Tick this checkbox to open a group of settings which allow you to control the relative brightness of surfaces in baked ambient occlusion. Higher values indicate a greater contrast between the occluded and fully lit areas. This only applies to the indirect lighting calculated by the GI system. This setting is enabled by default.
Max Distance Set a value to control how far the lighting system casts rays in order to determine whether or not to apply occlusion to an object. A larger value produces longer rays and contributes more shadows to the lightmap, while a smaller value produces shorter rays that contribute shadows only when objects are very close to one another. A value of 0 casts an infinitely long ray that has no maximum distance. The default value is 1.
Indirect Contribution スライダーを使って、完成したライトマップで表示される間接光 (アンビエントライト、オブジェクトにバウンドしたライト、オブジェクトから放出されたライト) の輝度を 0 から 10 の間で増減します。デフォルト値は 1 です。1 より小さい値にすると強度が下り、 1 より大きくすると強度は上がります。
Direct Contribution スライダーを使って、最終的なライトマップで表示される直接光の輝度を 0 から 10 の間で増減します。デフォルト値は 0 です。この値を大きくすると、直接光に適用されるコントラストが強くなりります。
Directional Mode You can set the lightmap up to store information about the dominant incoming light at each point on the objects’ surfaces. See documentation on Directional Lightmapping for further details. The default mode is Directional.
Directional In Directional mode, Unity generates a second lightmap to store the dominant direction of incoming light. This allows diffuse normal mapped materials to work with the GI. Directional mode requires about twice as much storage space for the additional lightmap data. Directional lightmaps cannot be decoded on SM2.0 hardware or when using GLES2.0. They fall back to Non-Directional lightmaps.
Non-directional Non-directional mode disables Unity’s ability to generate a second lightmap to store the dominant direction of incoming light.
Indirect Intensity スライダーを使って、リアルタイムおよびベイクしたライトマップに保存されている間接光の輝度を 0 から 5 の値で制御します。1を超える値は間接光の強度を増加し、1 未満の値は間接光の強度を減少します。
Albedo Boost Use this slider to control the amount of light Unity bounces between surfaces, from a value between 1 and 10. To do this, Unity intensifies the albedo of materials in the Scene. Increasing this draws the albedo value towards white for indirect light computation. The default value of 1 is physically accurate.
Lightmap Parameters Unity uses a set of general parameters for the lightmapping in addition to properties of the Lighting window. A few defaults are available from the menu for this property but you can also create your own lightmap parameter file using the Create New option. See the Lightmap Parameters page for further details. The default value is Default-Medium.
The Progressive GPU Lightmapper (preview)
ライトマッピング - はじめに