Can you tell me which one is better, the normal 2d movie converted to 3d, or the left/right converted to 3d?

First of all, there is a misunderstanding

1.

The left/right one is itself a 3d image, but it is only displayed in left/right split-screen when it is played in a non-3d state. The real 3d playback is to display the left and right images alternately at 2 times the frame rate, and at the same time with the shutter type 3d glasses to make the left and right eyes receive different images, so as to achieve the 3d effect.

2.

2D to 3D is, on the basis of the original 2D movie, to carry out further post-production, post-processing of the screen as another general picture to achieve the 3D effect, itself in the playback and the above and left and right split-screen is not different.

Secondly, the effect

1.

2d to 3d need manual correction, and not by software alone can be done. Not that software can't do it, of course, but the effect is completely incomparable to manual processing. (For example, the 3d version of Titanic, from the 2d version of the repair over, but that is a post team after a considerable period of time to grind out the results, not a software a turn to complete the work)

2.

Left and right split-screen kind of is itself 3d video, do not need any software processing, just with the correct playback can be achieved in the original 3d effect.