Simplygon 10.3.5200.0

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LOD Recipe ​

The LOD Recipe is our preferred way of generating LODs for your Static- and Skeletal Meshes. It exposes various settings that lets you fine-tune your LODs to perfection.

We'll go through a simple LOD chain example using a LOD Recipe and give you some tips for further learning once you've grasped the basics.

Simple LOD chain example ​

Run the editor and open the content browser. Click Add → Simplygon → LOD Recipe and type a name.

image showing how to create a LOD Recipe
Figure 1: Creating a LOD Recipe.

Open the LOD Recipe editor by double clicking the new asset. Add a mesh (Static and/or Skeletal) using Add Mesh in the toolbar.

image showing how to add a mesh to the LOD Recipe
Figure 2: How to add a mesh to the LOD Recipe.

You can also assign a LOD Recipe to a mesh from inside the Static/Skeletal Mesh Editor, see figure 3.

image showing how to assign a mesh to a LOD Recipe from mesh editor
Figure 3: How to assign a LOD Recipe to a mesh from the Skeletal Mesh Editor. It works the same in the Static Mesh Editor.

By default three LODs will be added to the recipe, all using the Reduction Pipeline but with their Settings → Reduction Settings → Reduction Targets Triangle Ratio set to 0.5, 0.25 and 0.125 respectively.

default settings of the LOD Recipe
Figure 4: Default settings.

We will keep the default settings, but if you want more/less number of LODs you can change it under Number of LODs, as well as using a different pipeline to generate your lod. A good option to begin with might be to change what Reduction Targets you want to use. Depending on the Reduction Target Stop Condition you set it will either stop when all targets are reached or as soon as either one of them is fulfilled.

image showing how to change the reduction settings
Figure 5: Reduction Targets setting under the Reduction Settings.

Once you're done setting your settings, press the Build button in the toolbar to generate the LOD chain.

image showing how to build a LOD Recipe
Figure 6: Build the LOD Recipe.

After the process has finished you should be able to preview your new LODs in the Static and/or Skeletal Mesh Editor.

image showing the finished LODs
Figure 7: The finished LODs after the processing is done.
Top-left: LOD 0 at 622k triangles, top-right: LOD 1 at 311k triangles,
bottom-left: LOD 2 at 155k triangles, bottom-right: LOD 3 at 77k triangles

Supported Simplygon pipelines ​

Next steps ​

Now you should know the basics of how to work with LOD Recipes. You can learn more about the different features the LOD Recipe supports by following these links.