Scene very slow rendering and working in Corona 3 after I edit it in Corona 4.

When I open my scenes in Daily Bild 4 I turn switch to new Displacement.

And now I come back to Corona 3 and scene not want render it very slow.

And I have same problem when I save scene in Corona 3 And it slow render in Corona 2 or older.

How to fix it?

Hi. You can’t expect files from newer versions to work in older versions. So always make a backup before you test a file with a new version.

As mentioned, forward compatibility cannot be guaranteed (that is, loading a scene from a newer Corona version into an older Corona version). You could try starting with an empty Corona 3 scene and importing the objects from the scene saved in Corona 4, could be worth a try.

Thanks. Oh crap.