As the title states, when creating steam machines that have a high-pressure variant, both the LP- and HP-variant will have the HP-variant base-texture.
GTCEuStartupEvents.registry('gtceu:machine', event => {
event.create('test_steam_machine', 'steam', true)
.recipeType('sifter')
.workableSteamHullRenderer( true, 'gtceu:block/machines/sifter');
});