Have you properly applied the XML setting (step 8) after installing MGC_6.1.021_BSG_Arnova_TlnNeun_04.02.19.12.54.apk?
Lag in viewfinder is cause by overloaded buffer in this version which is easily fixable either by applying XML as shown or by enabling the Buffer Fix switch in app Settings.
thanks...i Gcam_6.2.030_Advanced_BF_V220.127.116.11822.1145.apk works for my V35 as it seems BF means it has the buffer fix built in. shame it doesn't allow for zero shutter lag as for phones that don't need a buffer fix. as the OEM camera can take photos super fast.
here are my settings for my LG V35 on Pie on Gcam_6.2.030_Advanced_BF_V18.104.22.168822.1145.apk
back camera: Pixel 3 XL
front camera: Nexus 6P
AWBGains Mod: OFF, was causing GREEN photos with it on
RAW FORMAT: RAW_SENSOR
Image Format: JPEG (if i set YUV_420_488 GCam crashes)
P3 wide-color, Wide Color gamut
playing around with Custom Lib Repo by cstark and with Eszdman v2.6 beta 2
image quality is awesome, and no blur upon shutter snap as with other GCams! Thanks @arnova!