If the image remains unclear after keystone correction, please check for dirt on all camera lenses and clean them as necessary. This includes, but is not limited to, the optical engine lens, TOF lens, Image Sensor, and Illuminance Sensor. After ensuring that all lenses are clean, perform the keystone correction again.

If the above solutions cannot solve your issue, please contact Nebula Customer Support at support@seenebula.com for further assistance.