Timber

• A smoother, weightier fall. The game only sends an entity's tilt in steps of about 1.4°, so the slow moments (the lean-back, the first moment of the fall, the bounces) used to move in small jerks. Every block now carries its exact angle, so the whole tree glides at any frame rate.
• The chop jolts the tree: its top shivers, then it drops onto the stump with a squash and a little stretch.
• It leans back with a creak, then starts falling from rest with a crack and speeds up all the way down.
• The trunk bends as it falls: the top lags behind while the tree speeds up.
• A heavier slam: the trunk squashes flat for an instant, the crown splats into the ground and bursts into leaves, dust kicks up along the trunk, and a few leaves drift down afterwards.
• Big trees bounce less, so a giant spruce no longer see-saws on its stump. The slam's sound and particles now land on the exact frame the tree hits.
• Leaves buried inside the crown get no display entity (nobody can see them): about a third fewer entities on big trees, for both the server and the client.

Same content as the data pack version: use either, not both.