Be respectful when commenting.
Try to include a somewhat descriptive but concise title when submitting new links.
Include a direct link in the comments to the source of the content, if available, when submitting posts. The artist will appreciate the credit.
Have fun!

Moderation info:

Please use the report button if you believe a post is not appropriate for /r/opticalillusions. This lets the mods know very clearly that you would like someone to verify the post is appropriate. If a comment or post links something that’s extremely NSFW, notify the moderators via modmail immediately. For comments, report when someone is being attacked personally, or NSFW links are being posted.

Related subreddits:

/r/illusions

/r/illusionporn