Minecraft wiki entry for List_of_broken_features, associated text: In 17w47a, due to changes to the breaking of blocks, particles would again be generated upon the creation of the golems and for the first time ever the wither. However, these particles are functionally and fundamentally different - where the particles were themed for the mob at first, these particles were simply the result of the constituent blocks being broken by the game, and as such were block breaking particles using the textures of the blocks in question.[4] The actual particles for these three mobs still remain to be fixed.