Glitch-like looking corrupted files

[marcelab30338496]

Hello,

I've been having a problem since August this year but is getting to be a real obstacle now.

After working long in one image with several layers, suddenly one of the layers gets a glitchy patchy look, and the more I try to edit it, the worst it gets. Even after pressing ctrl z the documents ends up being completely corrupted and unworkable. Here is an example of how the glitched parts look like.

My data:

Modellname: iMac

Modell-Identifizierung: iMac14,3

Prozessortyp: Intel Core i5

Prozessorgeschwindigkeit: 2,9 GHz

Anzahl der Prozessoren: 1

Gesamtanzahl der Kerne: 4

L2-Cache (pro Kern): 256 KB

L3-Cache: 6 MB

Speicher: 8 GB

Thank you for any help or clarification you can give to me.

Best,

Marcela.

[davescm]

It looks like a drawing issue with your GPU. As a troubleshooting step, try turning off the GPU in Preferences >Performance and close then restart Photoshop.

Dave