Place your HD PNG file into the assets/minecraft/textures/items (or models ) folder of your resource pack.
Ensure you do not change the internal file names (e.g., keep it diamond_sword.png if replacing a sword with a chainsaw) to ensure the game recognizes the override. Chainsaw Man 128x
Ensure the base file resolution matches the 128x requirement; according to Minecraft Wiki , higher resolutions (32x to 512x) require more hardware power but allow for smoother HD visuals. Integration: Integration: Running 128x textures can lower frame rates
Running 128x textures can lower frame rates (FPS) compared to default 16x textures, so users may need a more powerful GPU or optimization mods. Performance Considerations Use an editor like Photopea or
Make Your Own CUSTOM Minecraft Texture Pack in Under 5 Minutes
Activate it in the game's "Options" menu under Resource Packs . 3. Performance Considerations
Use an editor like Photopea or Blockbench to create a 128x128 canvas for the chainsaw.png item or entity.