Why is my GIF background glitching?

[lydiae16367482]

Help!

I am trying to complete a GIF for a website markerting banner on a website. 970x250px 

I rendered out the GIF using Adobe Media Encoder after creating the GIF in After Effects and it produces this glitching background when the neon sign flashes up!

I also created the same GIF using Photoshop to see if it rendered out in a better quality, this was better but still not as good as I would like it/the client would like it.

How can I export a GIF with a background that doesnt move/flicker/glitch?? (top right hand corner)

Thankyou for your help!

[Jeff Bugbee]

That's called banding. You would need to up the bitrate to attempt to get rid of that. It will increase the size of the gif substantially.

[Mylenium]

It will never look clean. Your image has way to many colors/ gradations and they simply cannot be accommodated in a GIF's limited platte of a maximum 256 colors. You need to understand the limitations of the format. this has nothing to do with AE or for that matter PS. You need to think of a more suitable design for your banner.

Mylenium