I just tried that by adding -nx 200 option Command Line Options in preferences window and it stopped 3DGS from crashing (which it did before I did this) with the image file: "Eiffel01_2048a+6.png " which is 12288x2048 pixels (filesize = 46,391,940 bytes), BUT it does not display the images correctly: the faces are streched and in wrong locations.

This result is similar to the test image above this one in the source code: "Beach01_2048b+6.png" which is is 12288x2048 pixels (filesize = 32,675,366 bytes).

Any idea why this would be happening?