Version: 2019.4
The Progressive Lightmapper
Lightmapping using Enlighten (deprecated)

The Progressive GPU Lightmapper (preview)

Note: This is a preview feature and is subject to change. If you have Scenes that use this feature, you might need to update them in a future release. Do not rely on this feature for full-scale production until it is officially released.

The Progressive GPU Lightmapper is a backend for the Progressive Lightmapper that uses your computer’s GPU and VRAM generate baked lightmaps and Light Probes.

Hardware and software requirements

プログレッシブ GPU ライトマッパーを使用するには、コンピューターに以下が必要です。

  • OpenCL 1.2 をサポートする少なくとも 1 つの GPU
  • 少なくとも 2GB の専用 GPU メモリ
  • A CPU that supports SSE4.1 instructions

If your computer has more than one GPU, Unity selects the same GPU that the Editor uses. You can also choose one GPU for rendering and a different GPU for light baking. For information on how to change this, see the Configure which GPU to use section of this page.

Note: If the baking process uses more than the available GPU memory, the process might fall back to the CPU Lightmapper. Some graphics drivers with virtual memory support swap to CPU memory instead, which makes the baking process slower.

Configure which GPU to use

You can select one GPU for rendering the Scene and another GPU for baking lighting. If the automatic GPU assignment doesn’t fit your needs, you can specify which graphics card to use for baking.

To see which GPU Unity currently uses for baking, in the Editor:

  • In your Project, open the Lighting window (menu: Window > Rendering > Lighting Settings). Next to Bake Performance, you can see the GPU.

マシン上で使用可能な GPU を確認する方法は、以下の通りです。

  1. Select the Progressive GPU (Preview) lightmapper in the Lighting Settings window.
  2. シーンでライトを生成します。
  3. Open File Explorer, and navigate to the following path: C:\Users\USER\AppData\Local\Unity\Editor. Open the file called Editor.log.
  4. ファイルで Listing OpenCL platforms を検索します。これによって、OpenCL デバイスに関する情報のログ部分にジャンプします。ここでは、利用可能な GPU と対応するプラットフォームとデバイスのインデックスを見ることができます。

To select a specific GPU for baking, enter this command at the command line (replace platform and device index with the relevant numbers):

Unity.exe "-OpenCL-PlatformAndDeviceIndices" <platform> <device index>

Your choice of assignment should depend on your needs while you’re working on the Scene. If you assign the strongest GPU to either activity, this can incur a performance impact on the other activity. If you encounter issues, try re-assigning GPUs.

The Progressive Lightmapper
Lightmapping using Enlighten (deprecated)