Preview window huge bug

Hi HongDaniel,

This is a widespread issue with the latest Intel driver. Rolling back to the previous driver should resolve this issue.

Thanks,

Rameez

That could be a corrupt source footage file.

How does it display if you view it outside of After Effects?

Your screenshot is cropped so all we know is that you only have one Illustrator file, five comps, and some solids in your project. We also know that Our Membrane comp is 30 seconds long and standard HD and for some reason 60 fps. I can't tell if it is in the Final Composition. 

Sometimes poorly compressed or damaged video files can cause glitches in rendering but it is unlikely that there are video files in your projects and the glitches that come from source footage don't usually look like the composition panel. I don't even know what the comp is supposed to look like. Is there green somewhere? What is the white square in the middle of the comp?

Since we have no idea what your workflow is or what effects you are using, or what the comp is supposed to look like at 8:56. It is hard to have any idea about what is going on in the project that could be causing problems. 

Try soloing the layers in the Final Composition one at a time until the glitch goes away. If you find a problem nested comp open it up and start turning off effects or soloing layers. A double-tap on the u key to reveal all of the modified properties on layers is your best friend now. You should be able to find something that makes the glitch go away. When you find the problem layer or comp, go into the Project Settings and try all of the options in the Video Rendering tab. Open up the Preferences and try different settings for Display>Hardware Accelerate... and Video Preview.  

Let us know what you find and maybe we can help fix the problem.