Skeletal Mesh LODs

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Creating Skeletal mesh LODs

Start by opening any skeletal mesh in Persona and make sure that you are in Mesh editing mode. In this example I will be using the kid from Kite demo.

In the Mesh Details tab you'll notice LOD Settings, change Number of LODs to 3 (can choose any number of course, but for this example we'll use 3) and press Apply Changes.

At this point you might already have notice 2 LODs has been generated with default settings. Where LOD1 has 50% triangles left and LOD2 has 25% triangles left. These LODs can be previewed by using the LOD dropdown button in the viewport.

If you would like to iterate your LODs you can do so by changing the reduction settings per LOD.

Reduction Settings

Type	Description
Percent Triangles	Percent of triangles to keep.
Max deviation	Specify how much the LOD should deviate from original LOD.
Silhouette	A higher value will result in a higher silhouette preservation.
Texture	A higher value will preserve texture coordinates better, thus introduces less distortion of the textures.
Shading	Specifies how important shading quality is. Choosing a higher setting will cause the simplification to better preserve hading quality but will result in a higher triangle count.
Skinning	A higher value will result in higher skinning preservation.
Welding threshold	Weld vertices that are withing this distance
Recompute normals	Specify whether or not to recompute normals
Hard edge angle	Any edge between two triangles, where the angle exceeds the set value, will not cause smoothing of normals.
Max bones per vertex	Specify maximum bone influences per vertex
Base LOD	Specify what LOD you would like to use as base LOD while generating the current LOD. E.g you can use LOD1 as base when generating LOD2