Thanks for your reply. I had rendered the scene like this:
1.create a first person project.
2. create a level, which has some buildings and trees.
3.render the scene, it ran well.
4.open “MyCharacter” blueprint, add a scenecapture2d component.
5.create a render target, and set the scenecapture2d’s Scane Capture(Texture Target) attach to.
6.create a material attach to the render texture.
7.create a widget blue print, push a image button to the UI, and set the material as the render target material.
8.on the level blue print, create the widget, and add to viewport.
It ran well but the trees Flicker so much on the rtt, and the original window didn’t. I had set the scenecapture2d’s temporal AA method, it didn’t work.
And if i turn off the project setting’s TAA, the original window also Flicker.
How can i deal with this?
Thankyou very much.