There is a problem when I try to render a single video frame as PNG from Sequencer.
When DX12 is enable it produces completely distorted image.
In non-DX12 mode everything works fine.
I use RTX 2080Ti and have enabled RT Reflections and Translucency.
This is an aspect ratio problem.
With DX12 only 16:9 setups work correctly.
Other ratios are invalid with DX12.
Without DX12 other ratios work fine.
Why is that? EPIC issue or MS DX12 issue ?
I’ve found the same issue. However, I don’t think it’s as simple as only 16:9 that works. I’ve been working at other resolutions but I’ve found specific resolutions cause the issue above (and other really odd behaviour). One resolution that causes it for me is 4620 * 1080 (4.28:1 aspect ratio) whereas 7680 x 1795 (also 4.28:1) seems ok.
It also seems that resolutions below 4096 allow any aspect ratios (at least for the variants I’ve tried) without distortion. Above this it becomes extremely unstable. Even 7679 x 1795 (1 pixel difference to the resolution that works) causes a huge offset. I’ve put in a bug report and quoted this page
I reported this bug (Unreal Engine Issues and Bug Tracker (UE-75174)) and apparently it has been fixed and will be in 4.23 or you can pull the specific fixes if you build locally
