If you want to improve the look of Minecraft Bedrock without changing too much, try Newb Shader. Newb X Legacy Shader (1.21, 1.20) is a lightweight shader that keeps the vanilla style. Newb X Legacy is a ported version of RenderDragon. It works on Windows and Android devices with Minecraft 1.20.
Source: Newb X Legacy Shader (1.21, 1.20)
Check Out: MCPE/Bedrock
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