We don't need it simply because the 4.3.1 LG camera app does the same... However, LG haven't released it yet and you need to flash it. I've been trying up and down to install it without rooting by trying adb push etc and failing... So frustrating!
New Phone: 16GB LG G2 D802
Past Phones: Nokia 6600 Slide, 16GB iPhone 4 Black, 16GB Pearl Blue Samsung Galaxy S3 lag edition, 16 GB Black Xperia Z1 C6903