I have a screen with a partial 3D rendering viewport. Nothing unusual, it’s just that the camera’s viewport values are between 0 and 1 instead of 0 and 1. I noticed on that screen that performance is horrible, and gets worse as the game resolution increases. Out of curiosity, I changed the viewport to render fullscreen on that camera, and now it runs as smooth as I hoped. Is there an expected performance hit when not rendering full screen?
I should also mention, this only seems to be a problem on a build. In the editor the performance is fine.
Does anyone from Unity read these forums?
Anyway, I’ve noticed that on other screens that use partial viewports, I don’t have performance issues, so I guess it’s something else specific to this screen. Just doesn’t make sense that performance is fine on this screen if the viewport is the whole screen.
Found the culprit, just in case anyone else runs into this…
“Enable HDR” option on the camera apparently causes poor performance on partial viewports.