“Particle MBlur” map is not supported by Corona. Use true motion blur instead as usually it does not incur a speed penalty

This message is caused by having Particle MBlur map present in the scene. Corona does not support Particle MBlur map as it is a legacy, heavily “faked” feature. Adding this map may lead to instability or incorrect results.

Possible causes:

Particle MBlur map present in the scene.

Solutions:

• Remove Particle MBlur map from the scene
• In case you need particle motion blur, use real Corona motion blur instead. It will render faster and look better

See: Motion blur in Corona , Known bugs and limitations