About scene lightmaps and scene optimisation.

[Wolf17]

  HMmmm! That is really bad. Can't we use an obfuscator or something ? (Do they exist?)

[Thomas.]

Yes of course, this is way how to do it more difficult.

[EgonOlsen]

I wouldn't worry too much about all this. If you are going to seel something, 99.9999% of the market won't bother with such things.

[Irony]

   One More question . It is easy to rename an .apk file as .zip  and access the assets and resource contents. Is there a way to hide them?

If you serialize your models, one can only use them with JPCT, but not edit them with Blender or 3d-Studio or utilize them in any other engine. If you use assets from e.g. Turbosquid, you are even required to do something like that.

[Wolf17]

  Thank you all for replies ! That Helps !