Board Thread:News and Announcements/@comment-14908162-20160704083426/@comment-26239285-20160705065722

According to the Epilepsy Foundation causes besides flashing lights include:

"Certain visual patterns, especially stripes of contrasting colors."

The British Epilepsy Association seems to agree:

"Some patterns, like stripes or checks, can also trigger seizures for some people with photosensitive epilepsy."

Therefore I would err on the side of caution and add the warning.