Issue: When using BokehDOF with a Focal Distance of 0.0 (cm) and a Focal Region larger than 0.0 (cm), FPS drops massively with objects close ([Focal Region] cm away) to the camera. Hardware: See here. Steps to reproduce this Issue:
Create a new Project (With Starter Content)
Create a PostProcess Volume, make it unbound.
Set Depth of Field Method to BokehDOF.
Set Focal Distance to zero.
Set Scale to non-zero.
Set Focal Region to non-zero (distance in which you want the fps drop to happen).
Fly as close as you can to the vase on the table. Or the table. Just anything in general.
Experience visual lag.
I think this may be related to the near transition region trying to exist in negative depth when the Focal Region is greater than 0.
I will begin with my preface that the Master Branch is meant merely for testing as it is at the best of times unstable with untested fixes and new features always being added in.
Ok with that out of the way, can you let me know what the DOF settings actually were when you have the FPS drop? Also what was the Bokeh Texture used, was it the default one? Also if you could under the Help >> About Unreal Engine you should see a 7 digit number after the version number, this is the Changelist number, can you let me know what that is as well?