How to get back the salt icon? As it is now rock salt [32432443243242343234]

It’s just dust with a certain color. Almost all GT6’s texture are generated like that base on what they are are the properties of the material, so the one for NaCl then: https://github.com/GregTech6/gregtech6/blob/master/src/main/resources/assets/gregtech/textures/items/materialicons/CUBE/dust.png …