An MT6769T (Helio G90) scatter file will brick an MT6769Z (Helio G85) device because gpu_dvfs partition size differs.
You can find "complete paper" versions—detailed technical layouts—on various documentation platforms: MT6769 Scatter File Details (V1.1.2) : A comprehensive guide on detailing EMMC storage partitions. MT6769 Android Scatter (New Format) : Outlines configuration settings for the MTK_PLATFORM_CFG. MT6769 Android Scatter File Guide : A technical reference for operating system technology on the platform. How to Use the Scatter File Preparation mt6769 scatter file exclusive
This method yields a 100% device-exclusive scatter file, accounting for any custom NVMM modifications made by the OEM. An MT6769T (Helio G90) scatter file will brick