• Please use real names.

    Greetings to all who have registered to OPF and those guests taking a look around. Please use real names. Registrations with fictitious names will not be processed. REAL NAMES ONLY will be processed

    Firstname Lastname


    We are a courteous and supportive community. No need to hide behind an alia. If you have a genuine need for privacy/secrecy then let me know!
  • Welcome to the new site. Here's a thread about the update where you can post your feedback, ask questions or spot those nasty bugs!


  1. Dr Klaus Schmitt

    [UV, VIS] Rudbeckia hirta stereo butterfly vision

    Some of my recent works on human and (simulated) insect vision, here how a flower ("black eyed susan", Rudbeckia hirta more specifically) may look like seen through a butterflies' eyes (only the sensitivity aspect: UV mapped in as blue). The stereo images are LRL images and allow crosseyed...