LFS Editor/Guides/Optimisations

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Vehicle Mods

There are several optimisations that should be done to a vehicle mod in order to improve in-game performance. This can have a significant impact on framerate, especially in a full grid of 40 cars on track.

• Use fewer triangles / points on the model where possible. You can achieve good looking results even with a less detailed model than the hard limit of 65536 triangles.
• Combine multiple textures of the same subobject onto a single texture page for efficiency. For example, if you have 11 textures with a resolution of 128x128 each, that are all used on the steering wheel object, you could combine them into a single 512x512 texture with a room for 5 more. However, do not combine all the existing textures on a single page, as it brings no benefit, just huge texture sizes.
• Optimize wheel objects by sharing textures between multiple alpha cutouts to reduce texture switching.
• For closed cockpit cars, set "Concealed driver" to YES.
• Convert the hub object into the spoke object to reduce moving subobjects.
• Eliminate the use of Tree Edge Alpha (TEA) cutouts for vehicles, as it is not officially supported and adds unnecessary materials.

References

• Scawen's optimization tips for the N.400S GT4 vehicle mod (21 Jan 2024, LFS Forum)