Render Scale (Render Scale) is a technical term that is extremely important in rendering and optimizing game graphics (technical art). Explanation of a function that dynamically scales only the internal rendering resolution of the 3D drawing area while leaving the game's UI resolution (100%) unchanged, dramatically reducing the pixel load on the GPU while completely maintaining the crispness of the UI.
Real-world analogy: A smart money-saving technique by sandwiching a slightly thinly drawn "pencil background drawing (3D screen reduced to 80%)" under a "high-definition clear file (100% resolution UI)" with beautiful text and overlapping it
Render Scale is a hybrid drawing system that clearly draws the UI (the menu that the user sees), such as text and icons, at the limit resolution (100%) of the Retina display, and only draws the heavy 3D space (characters and effects) behind it on a slightly reduced canvas (e.g. 80% size), then stretches it to the screen size and overlays it.'' By significantly reducing the pixel area of the 3D world (fill rate, which is the GPU's maximum bottleneck), you can dramatically increase the speed of the game while maintaining nearly 100% of the overall aesthetic beauty.
Figure: An infographic that clearly illustrates the basic processing flow and mechanism of Render Scale (Render Scale) in Japanese notation
Detailed mechanism and operating principle
Set "Render Scale" of the URP asset to about "0.75 to 0.85". As a result, the drawing resolution of the 3D world is secretly reduced by approximately 20%, and the UI is superimposed with 100% clear image quality.