Eww, yeah, that shoudn't happen.
Please post the contents of the fml-client-latest.log
file inside the log
folder inside your .minecraft
folder to some pastebin site and link to the post here.
Note that this log will only contain information on the last time you started Minecraft, not any previous runs.
Same thing, yeah. The render in the original post is actually without optifine. I just installed optifine to see if it would happen with optifine installed.
It's odd, because having the camera not moving - everything is just fine. But once the camera moves it seems like part of the image is rendering a frame ahead of itself.
I'm not sure if this will help, but this is the export.log file in the .minecraft folder itself. https://paste.replaymod.com/sitalewugi.pl
Here are the settings I'm using to output.
Is there any other info I could provide that could help?