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The lowest resolution LOD won't need a normalmap and propably not even a specular or gloss map (test it for your object). In addition to reducing the polygon density, it is best practice to also reduce shader complexity and the amount of textures used - because those too eat valuable ressources. This has to do with how draw-calls work (instructions that the CPU sends to the GPU). it does not really matter if a resolution LOD has 50 or 400 Polygons, it does matter alot more in this case if it has 1 section or 4 sections). If a resolution LOD has far below 500 Polygons, the amount of sections has a much bigger impact on performance then the Polygoncount (e.g. (Example: Tank has Commander Machinegun as a Proxy - the machinegun may switch to lowest poly LOD before Tank switches from resLOD 0 to resLOD 1).Ī common practice is to half the polygon amount for the next lower resolution LOD by ~2Īs a guideline, the lowest resolution LOD should have a polygoncount of somewhere around 500 and as few sections as possible.

The proxies switch LOD independantly of the main p3d's resolution LOD however. Proxies need to be included in every resolution LOD that they should appear in. They should be ordered according to their polygoncount (highest polycount has number 0 (or 1), second highest one number 1(or 2) and so on). Therefore the modeller needs to provide multiple resolution LOD with different polygon-density.

The algorithm needs enough different resolution LOD to be effective. In Arma 3 the number of the resolution LOD has no impact and there is no way to specify which LOD is to be used at which range. view-distance, number of objects, video quality, CPU utilization, etc.). The switching of different resolution LOD happens automatically, based on various factors / in-game conditions (e.g. Without the resolution LOD technique, the games would be unplayable due to bad performance.

This is done to prevent excessive demand of computing ressources. In Open-World 3D Games (including all Arma Titles) it is standard practice to swap out high-resolution Models with medium- or low-resolution models at far distance from the observer. There should always be more than 1 resolution LOD (unless it is a low poly object). Resolution LOD are those LOD that are visible in the game to the player from the outside view.