Lighting

Use static light for all light sources. Exception is sunlight (Stationary), or dynamic light sources (for example, a torch in hand can be movable, but must be turned off cast shadows). Smaller radius of influence of dynamic light source - better performance. Use lighting complexity mode for scene visualisation.

Color code: blue color - good for performance, green, red, white - bad and very bad

Scene Complexity

Number of triangles per frame, complexity of the shaders, and number of draw calls are all very important to performance! Budgets: Triangles: 1 200 000 (vr mode), 600 000 (non vr mode) Draw Calls: 1000 (any vr mods)

Shader complexity mode

Color code: green - good. Red and white - bad and very bad Use console comands for scene profiling (press ~ to use a console): ⦁ Stat SceneRendering ⦁ Stat RHI ⦁ Stat UNIT

Adviсe on optimization

• Use BP_Spectator actor for fast testing scenes without VR (non vr mode)

• Reduce number of objects in your scene. If possible, shape the scene so that objects overlap each other (for more effective culling work). Use LODs for each object (more then 500 tris). You can generate LODs in engine.

Then you can adjust LODs visibility distance manually

• Use Impostor LOD technology for trees: https://www.youtube.com/watch?v=loFhp4uWZ1U
• Don't use complex collision as simple for anything other than terrain

• Generate convex collision in engine