What happend to this?

I’m a voice,i’m sorry for my english is poor.
I want to know what happend to this?ghost image???
I had restarted UE4,but the ghost image still so.
And the launch file(.exe) is still so
The video card is NVIDIA Quadro K620,and the driver is the lastest,I had updated it yesterday.
Thank you!!!

I doubt this has something to do with UE4 per se.

This is how anaglyph stereoscopic mode looks like. I do not own an nVidia card so I can’t guide you precisely, but do visit the nVidia control panel and search for stuff that has stereoscopic on it, or anaglyph - it’s very likely it is activated for 3d rendering.