Unity Editor (v.2019-)

Unity is a flexible development platform used for creating 3D, 2D, VR, and AR experiences. From game development to simulations, it benefits significantly from GPU-accelerated rendering and RTX-based ray tracing. Using these advanced GPU features can improve lighting, rendering, and overall scene performance, especially in complex 3D projects.

How to Enable GPU and RTX Accelerated Ray Tracing in Unity

1. Install Unity Hub and Unity LTS

   

   • Download Unity Hub from the Unity Store and install the latest Long-Term Support (LTS) version.

2. Create a New 3D Project

   • Launch Unity Hub and start a new 3D project.

3. Enable GPU Lightmapping

   

   • In Unity Editor, go to Window > Rendering > Lighting Settings.

   • Scroll down and set the Lightmapper to Progressive GPU (Preview) to enable GPU-based lightmapping for faster rendering.

4. Enable RTX Denoising

   

   • Under both Direct Denoise and Indirect Denoise, choose OptiX (for NVIDIA RTX GPUs) to enable AI-driven denoising, improving the visual quality of your lightmaps.

5. Auto-Generate Lightmaps

   • Ensure Auto Generate is enabled at the bottom of the Lighting Settings window for continuous lightmap updates as changes are made.

These steps allow Unity to use your GPU for faster rendering, especially with advanced features like ray tracing and denoising, improving both development speed and final visual quality.

Top Tips to Speed Up Unity Performance

1. Use Progressive GPU Lightmapper
   The Progressive GPU Lightmapper significantly reduces baking times, especially for complex scenes. Ensure you have a compatible high-end GPU to get the most out of this feature.

2. Adjust Lightmap Resolution
   Lowering the resolution or sample rate of your lightmaps during development can speed up rendering times, allowing for quicker iteration.

3. Optimize Scene Geometry
   Simplifying scene geometry by reducing polygon counts or using LOD (Level of Detail) can lessen the load on your GPU, improving overall rendering speed.

4. Keep GPU Drivers Updated
   Regularly updating your GPU drivers ensures you have the latest optimizations for performance, especially for RTX ray tracing and lightmapping features.

Recommended GPUs for Unity and Ray Tracing

For the best GPU performance in Unity, especially when using ray tracing or GPU lightmapping, here are some top recommendations:

1. NVIDIA GeForce RTX 4090
   Ideal for heavy-duty rendering and real-time ray tracing in Unity. This GPU is best suited for large-scale projects with complex lighting and materials.

2. NVIDIA GeForce RTX 3080
   Offers a solid balance of performance and cost, great for developers needing smooth rendering and GPU acceleration for medium to large projects.

3. NVIDIA GeForce RTX 3060 Ti
   A cost-effective option for smaller teams or independent developers, delivering good performance for lightmapping and ray tracing in 1080p or 1440p projects.

4. AMD Radeon RX 6800
   A viable option for developers preferring AMD, offering decent GPU performance for lightmapping and rendering, although NVIDIA typically outperforms with ray tracing.

Optimizing your hardware setup, alongside Unity's built-in features, can significantly reduce iteration times and improve project quality.