[G3 Themes and Apps] :
Did you replace update center.? Aka LGDMCSclient? Cause i am not sure if I posted it.

There was a fix that I posted before. the problem seems to be in camera_config where "beauty shot" was never mentioned so I took pretty much all code (except hal) and merged it with G3 one

<?xml version="1.0" encoding="utf-8"?>

<Preference>

<G3>

<!-- Mode ************************************************* -->

<item name="mode_rear_supported">

mode_normal,

mode_refocus,

mode_panorama,

mode_dual_camera

</item>

<item name="mode_front_supported">

mode_normal,

mode_dual_camera

</item>

<!-- camera rear size ************************************************* -->

<item name="camera_pictureSize_rear_supported">

4160x3120,

4160x2340,

3120x3120,

2048x1536

</item>

<!-- 3264x2448,-->

<item name="camera_previewSize_rear_supported">

1920x1440,

2560x1440,

1440x1440,

1920x1440

</item>

<item name="camera_previewSizeOnScreen_rear_supported">

1920x1440,

2560x1440,

1440x1440,

1920x1440

</item>

<item name="camera_pictureSize_rear_default">

4160x2340

</item>

<!-- camera front size ************************************************* -->

<item name="camera_pictureSize_front_supported">

1920x1080,

1280x960

</item>

<item name="camera_previewSize_front_supported">

1280x720,

1280x960

</item>

<item name="camera_previewSizeOnScreen_front_supported">

2560x1440,

1920x1440

</item>

<item name="camera_pictureSize_front_default">

1920x1080

</item>

<!-- video rear size *************************************************** -->

<item name="video_size_rear_supported">

3840x2160,

1920x1080,

1280x720,

1280x720@120,

640x480,

320x240,

176x144

</item>

<item name="video_previewSizeOnScreen_rear_supported">

2560x1440,

2560x1440,

2560x1440,

2560x1440,

1920x1440,

1920x1440,

1056x864

</item>

<item name="video_size_rear_default">

1920x1080

</item>

<!-- video front size *************************************************** -->

<item name="video_size_front_supported">

1920x1080,

1280x720,

640x480,

320x240,

176x144

</item>

<item name="video_previewSizeOnScreen_front_supported">

2560x1440,

2560x1440,

1920x1440,

1920x1440,

1056x864

</item>

<item name="video_size_front_default">

1920x1080

</item>

<!-- focus *************************************************** -->

<item name="focus_supported">

mw_continuous-picture,

manual-focus,

face_tracking

</item>

<item name="focus_default">

mw_continuous-picture

</item>

<!-- iso *************************************************** -->

<item name="iso_supported">

auto,

100,

200,

400,

800

</item>

<item name="iso_default">

auto

</item>

<!-- zsl supported *************************************************** -->

<item name="zsl_supported">

1

</item>

<!-- Multi AF supported *************************************************** -->

<item name="multi_af_supported">

true

</item>

<!-- HDMI MHL supported *************************************************** -->

<item name="hdmi_mhl_supported">

true

</item>

<!-- Morpho night shot *************************************************** -->

<item name="morpho_night_shot_supported">

true

</item>

<!-- Renesas ISP *************************************************** -->

<item name="use_renesas_ISP">

false

</item>

<!-- MTK *************************************************** -->

<item name="MTK_chipset">

false

</item>

<!-- Light frame *************************************************** -->

<item name="light_frame_supported">

true

</item>

<!-- Long shot *************************************************** -->

<item name="long_shot_supported">

true

</item>

<!-- panorama *************************************************** -->

<item name="panorama_picture_size">

4160x2340

</item>

<item name="panorama_preview_size">

1280x720

</item>

<item name="panorama_preview_size_on_screen">

2560x1440

</item>

<!-- beautyshot *************************************************** -->

<item name="beautyshot_supported">

2

</item>

<!-- HDR *************************************************** -->

<item name="hdr_supported">

3

</item>

<!-- Face detection *************************************************** -->

<item name="face_detection_supported">

true

</item>

<!-- super zoom *************************************************** -->

<item name="super_zoom_supported">

true

</item>

<!-- AE focus *************************************************** -->

<item name="AE_focus_supported">

true

</item>

<!-- Motion Quickview *************************************************** -->

<item name="motionquickviewer_supported">

true

</item>

<!-- Remote shutter *************************************************** -->

<item name="remote_shutter_supported">

true

</item>

<!-- Raw format *************************************************** -->

<item name="raw_picture_saving_supported">

true

</item>

<!-- Manual mode *************************************************** -->

<item name="manual_mode_supported">

true

</item>

<!-- Beauty shot tone adjustment value ********************************* -->

<item name="beautyshot_tone_adjust">

75

</item>

<!-- Voice shutter *************************************************** -->

<item name="voice_shutter_supported">

true

</item>

<!-- JamJam shot *************************************************** -->

<item name="jamjam_gesture_supported">

true

</item>

<item name="flash_disable_battery_level">

15

</item>

</G3>

</Preference>

Copy this to a original text file and save it as an xml file camera_config.xml

And put in system/etc

I posted a fix earlier but it never made it to the op

So the G3 Xcam doesn't work?

You should be able to screenshoot with volume down and power?

I think I might replied to wrong person was referring to force close of update center.

At what is your system