"Only applicable for phones with Xperia™ Style portrait app in Camera.
Style portrait helps you to create a different you by applying your favorite styles when taking portrait photos.
The styles may include face effects, color filters, and deco frames.

Add Ink Wash style effect to Xperia™ Style portrait application.
With Ink Wash style effect you can have this real-time style in your viewfinder.
The style of Ink Wash can be managed and edited in style collection.
Copyright © 2015 Sony Mobile Communications Inc."

From version Ink wash 1.0.1:
All versions
January 5, 2016