RealSource resource pack is a way into the world of Minecraft HD textures. It aims into the zone of ultra-realistic packs, but it is for you to decide if it fits the criteria. On my part, I would like to express satisfaction with how good the pack looks for its moderate 128x resolution. However, nothing is perfect, and in this pack, it would be the absence of textures for some blocks.
Credits: REALSOURCE RTX PACK