RTX texture packs add physically based materials (colour, metalness, emissive, roughness and normal or height maps) that Minecraft Bedrock Edition uses when ray tracing is on.
Ray tracing runs only on Windows PCs with a graphics card that supports DirectX Raytracing, so these packs do not change the look on phones or consoles. Some packs also include Vibrant Visuals materials; check each project's description.
