level-of-detail
Table of Contents
Level Of Detail
To reduce the rendering performance impact of models with high triangle counts or models with a lot of instances, Hurricane supports levels of detail (LOD). This allows models to be rendered with a different mesh at different distances to the camera.
Hurricane supports 5 different levels of detail:
Level ID | Min distance | Max distance |
---|---|---|
0 | 0 | 50 |
1 | 50 | 100 |
2 | 100 | 200 |
3 | 200 | 300 |
4 | 300 | ∞ |
How to
To add LOD to your model, for each mesh in your model, do the following:
- create less detailed versions of your mesh
- for each level, put your meshes in child nodes named
LOD_X
withX
being the selected level - alternatively, you can use a single mesh for multiple levels of detail: for example, if you name your mesh node
LOD_23
, this mesh will be used for rendering at levels 2 and 3 - if you want to hide a model at long distance (useful for small props too small to see from far away anyway), don't use levels past the max rendering distance you want: for example, if you want a small prop to not be rendered at a distance greater than 100, only create meshes
LOD_0
andLOD_1
Example
Here are a few examples of model hierarchy using LOD
Before LOD
RootNode
BuildingMesh
← high detailed mesh
With one mesh per level
RootNode
BuildingMesh
LOD_0
LOD_1
LOD_2
LOD_3
LOD_4
With one detailed and one simplified mesh
RootNode
BuildingMesh
LOD_012
LOD_34
Here, the model is rendered with the mesh LOD_012
for a distance inferior to 200, and with the mesh LOD_34
for a distance greater than 200.
Only for close distance
RootNode
SmallPropMesh
LOD_01
In this configuration, the mesh LOD_01
is used to render the model to a distance up to 100, and then the model is hidden.
level-of-detail.txt · Last modified: 2020/04/28 18:24 by maxime