why does the hemp seed look like a helmet when you're holding it?

Read the OP. (Note that I "cheated" the pumpkin texture, to use the top and bottom in the floor/ceilling (looks like stone bricks), and the sides to make glowing tree (looks like dark wood). You can switch to the regular pumpkin texture by using the terrain-alt, just delete the terrain.pn...

What's up with the Pumpkin texture? the sides are oak logs and the top is stone brick and the front is the pumpkin face.