I'll be adding the sulfur cave update's blocks next patch.

NEW BLOCKS/ITEMS

• Added Poplar Log
• Added Poplar Wood
• Added Stripped Poplar Log
• Added Poplar Planks
• Added Poplar Slab
• Added Poplar Stairs
• Added Poplar Door
• Added Orange Poplar Leaves
• Added Red Poplar Leaves
• Added Yellow Poplar Leaves

FIXES/CHANGES

• Fixed Acacia Leaves Particles