Hi I was wondering if anyone has ever seen this or has any idea what this may be. I was shooting a job with my 1d mk3 and suddenly I noticed this weird cross grid pattern in my files. Ive tried clearing settings, pulling the battery, swapping cards, etc. its def in the body. It happened out of the blue. I figured Id ask before I send it back to canon service since its the weekend. This is just a shot of a white wall, the cross pattern is clear, but the dark and light shadow is also appearing as well.