The console command r.setres seems not very reliable.
This happens when used from c++ or when entered by hand in the console.
The size is handled correctly (and the f/w option) but the resolution is not updated all the time.sometimes it works, sometimes no, and the windowed option seems more reliable than the fullscreen option. So i often find myself changing first the resolution in w mode (r.setres 1920x1080w) and then go for full screen (r.setres 1920x1080f).
I have seen similar problems in older posts but they are from previous versions of the engine, i am running 4.5.1 currently.
I have attempted to reproduce what you were talking about and I guess I am having some trouble understanding the steps you are taking. I have my own project open, which is using the ThirdPerson BP template, and brought up the console command while playing in a new window.
I typed the "r.setRes 1920x1080w which draws the screen to occupy the entire screen in windowed mode. I also tried 800x600w which set the window mode to that resolution and resized my window. As for the fullscreen mode I used the “F11” key while playing in the viewport. I tried typing the “r.setRes 1920x1080f” while in windowed and it did nothing. Is this what you are talking about?
Thank you for the clarification. I have since attempted to reproduce your issue and with no luck. This might be hardware or driver specific so would you mind sending me your dxdiag so I can further investigate?
I have made the developers aware that this is still an issue as of recent build, and have created a new bug report so it can be addressed. I appreciate your patience with this matter as well as the documentation you provided in order for us to fix this issue.
Various fixes have gone in for the resolution switching system, some of which I believe will be in the 4.6 release. With our latest code here, I can’t reproduce any of the behaviour you describe above, so hopefully it’ll all be fixed when these changes make their way to you!
Please create a new post so we can address it there with steps and screenshots where appropriate. This post is outdated, so for tracking purposes, we would like a new post be made using the engine version you mention.