Unity Technologies has released a new version of Unity to all developers. Unity 2018.2 comes with numerous graphical and performance improvements that will help developers achieve greater visuals, and has been to build on the Scriptable Render Pipelines (SRPs) in order to enable next-level rendering.
Unity 2018.2 optimizes the performance of the Lightweight Render Pipeline (LWRP) and enhances the High Definition Render Pipeline (HDRP) to help developers achieve high-end visual quality, including multiple improvements to the Shader Graph, which now supports both pipelines (please note that both the LWRP and HDRP are currently in preview.)
The SRP batcher is a new Unity engine inner loop that speeds up CPU rendering without affecting GPU performance. It replaces legacy SRP rendering code. According to the developers, games that use Physically Based Rendering (PBR) often have many different objects and meshes that share the same shader and keywords for all the different materials per object. The SRP batcher gives games that use PBR a major CPU speed boost.
The Lightweight Render Pipeline (LWRP) delivers high performance, which is especially useful for lower-end hardware and performance-hungry applications. LWRP improves performance and optimization further with Optimized Tile utilization. LWRP will adjust the number of load-and-store to tiles in order to optimize the memory of mobile GPUs. It also shades light in batches, which reduces overdraw and draw calls.
On the other hand, the High Definition Render Pipeline (HDRP) prioritizes high-definition visuals targeting primarily high-end platforms, such as PC and consoles, featuring improvements for volumetrics, glossy planar reflection, Geometric specular AA, and Proxy Screen Space Reflection & Refraction, Mesh decals, and Shadow Mask.