Only for rooted devices

Magisk

• install LSposed using Magisk Manager and enable Zygisk in settings
• install the Pixelify apk (don't forget to allow root access) and choose Pixel XL for unlimited original quality

KernelSU

• install LSposed and Zygisk using the KernelSU app: LSposed and Zygisk-on-KSU
• install the Pixelify apk (don't forget to allow root access) and choose Pixel XL for unlimited original quality