Seam clip

A seam clip is a precise type of clip that involves clipping through the seam where two adjacent surfaces meet at a convex angle, generally of approximately 90 degrees or less. Clips through horizontal seams are called ledge clips, while clips through vertical seams are known as corner clips. Corner clips were previously known as crouch clips or LJCCs (short for "lol, just crouch clip"), as they were believed to only be possible while crouching, which has since been disputed.

Although both variants of seam clips are extremely precise, ledge clips are often considered more difficult since it is harder to align Mario perfectly for the clip. Ledge clips tend to have no consistent setup. Corner clips tend to vary more in difficulty, with some being relatively easy given enough setup time and others being very precise.

Properties

Seam clips appear to require Mario to approach the seam at a specific angle, in addition to hitting the seam in the correct spot. Ledge clips seem to be most frequent while Mario is in a dive animation, but seem to be possible during any animation that allows Mario to approach at the correct angle. Corner clips are most frequently performed while Mario is walking, crouch walking, or rolling, but also be seem to be possible with any movement. Wherever it is possible to clip Mario out of bounds using a corner clip, it is generally also possible to clip Cappy through by throwing him at the same angle that would cause Mario to clip.

The exact cause of seam clips is unknown. While it was previously speculated that they are caused by a tiny gap in the collision, some seams where clipping is possible do not have such a gap.

Seam clips are also known to be possible as certain captures.

Uses

Two speedrun tricks used in the Any% run, among other categories, that utilize corner clips are Lake Clip and Ice Corner Clip. The former has a consistent setup and is used by many high-level runners, while the latter must be performed in midair and is therefore much less consistent, making it rarely used in actual speedruns.

Another trick utilizing a corner clip that is used in the World Peace and Darker Side categories is Inverted Pyramid Skip. This clip has no consistent setup at all, since it must be performed high in the air and there is no ground that can be properly used for alignment.

Locations

The following is a list of known seam clip locations:

Kingdom	Location	Type	Video	Capture?
Cap Kingdom	The exterior exit door at the top of Top-Hat Tower.	Corner	Link
Cap Kingdom	The hat-shaped airship guarded by the Bonneter.	Corner	Link
Cap Kingdom	The edge of an airship floating in the fog.	Ledge	Link
Cap Kingdom	The entrance door within the Poison Tide sub-world.	Corner	Link
Cap Kingdom	The entrance door within the Poison Tide sub-world.	Corner	Link	Paragoomba
Cascade Kingdom	The stump near the start of the kingdom.	Ledge	Link
Cascade Kingdom	The top portion of the fallen rock bridge.	Ledge	Link
Cascade Kingdom	The edge of the ground next to where the bridge lands.	Ledge	Link
Cascade Kingdom	A raised piece of ground near where the bridge lands.	Ledge	Link
Cascade Kingdom	The wall just behind the Odyssey upon first visiting the kingdom.	Ledge	Link
Cascade Kingdom	A wall to the left of where the Odyssey is first found.	Ledge	Link
Cascade Kingdom	Above a Chain Chomp target near where the Odyssey is first found.	Ledge	Link
Cascade Kingdom	Next to the Above a High Cliff moon.	Ledge	Link
Cascade Kingdom	The edge of the ground to the south of the T-Rex.	Ledge	Link
Cascade Kingdom	The edge of the ground to the east of the T-Rex.	Ledge	Link
Cascade Kingdom	An alcove containing regional coins below the T-Rex's resting spot.	Corner	Link
Cascade Kingdom	The south outer edge of the Madame Broode arena.	Ledge	Link
Cascade Kingdom	The northwest inner edge of the Madame Broode arena.	Ledge	Link
Cascade Kingdom	To the left of the bridge leading to the Madame Broode arena.	Ledge	Link
Cascade Kingdom	The edge of a 2D section in the Chasm Lifts level.	Corner	Link
Cascade Kingdom	A ledge south of the Stone Bridge checkpoint.	Ledge	File
Sand Kingdom	The lower portion of a building on the east side of Tostarena Town.	Ledge	Link
Sand Kingdom	The higher portion of a building on the east side of Tostarena Town.	Ledge	Link
Sand Kingdom	The north edge of the tall pillar near Tostarena Ruins.	Ledge	File
Sand Kingdom	The south edge of the tall pillar near Tostarena Ruins.	Ledge	Link
Sand Kingdom	The west edge of the tall pillar near Tostarena Ruins.	Ledge	File
Sand Kingdom	The north edge of the pillar with a moon on it near Tostarena Ruins.	Ledge	Link
Sand Kingdom	The east edge of the pillar with a moon on it near Tostarena Ruins.	Ledge	Link
Sand Kingdom	The south edge of the second short pillar near Tostarena Ruins.	Ledge	Link
Sand Kingdom	The northwest edge of a tall pillar north of Tostarena Ruins.	Ledge	File
Sand Kingdom	A diagonal seam on a ramp in the back of Tostarena Ruins.	Hybrid	Link
Sand Kingdom	The thin ledge on the backside of Jaxi Ruins.	Ledge	Link
Sand Kingdom	The side of the thin ledge on the backside of Jaxi Ruins.	Ledge	Link
Sand Kingdom	The archway at the end of the Jaxi Driving sub-world.	Ledge	Link
Sand Kingdom	The ground near a bridge leading to the Moe-Eye Habitat.	Ledge	Link
Sand Kingdom	The southwest edge at the top of the Inverted Pyramid.	Ledge	Link
Sand Kingdom	The west edge at the top of the Inverted Pyramid.	Ledge	Link
Sand Kingdom	The left portion of the Inverted Pyramid 2D section.	Ledge	Link
Sand Kingdom	The right portion of the Inverted Pyramid 2D section.	Ledge	Link
Sand Kingdom	The left edge of the Inverted Pyramid 2D section. Used for IP Skip.	Corner	Link
Sand Kingdom	The right edge of the Inverted Pyramid 2D section.	Corner	Link
Sand Kingdom	The side of the entrance inside the Inverted Pyramid.	Corner	Link
Sand Kingdom	The side of the entrance inside the Inverted Pyramid.	Corner	Link	Bullet Bill
Sand Kingdom	A square pillar on the left side of Deepest Underground.	Ledge	Link
Sand Kingdom	A square pillar on the right side of Deepest Underground.	Ledge	Link
Sand Kingdom	The east edge of the ground surrounding the oasis.	Ledge	File
Sand Kingdom	The west edge of the ground surrounding the oasis.	Ledge	Link
Lake Kingdom	The inside corner near End of the Hidden Passage. Known as Lake Clip.	Corner	Link
Lake Kingdom	The outside corner near End of the Hidden Passage.	Corner	Link
Lake Kingdom	The edge of the deep water well in the Water Plaza.	Ledge	Link
Wooded Kingdom	The edge of an alcove in a tree near the Odyssey.	Corner	Link
Wooded Kingdom	A ledge leading to the dead end near Road to Sky Garden.	Ledge	Link	Glydon
Wooded Kingdom	A tall ledge near the beginning of the Sky Garden Tower interior.	Ledge	Link
Wooded Kingdom	An alcove containing regional coins in the robot storage room.	Ledge	Link
Wooded Kingdom	An alcove containing regional coins in the robot storage room.	Ledge	Link	Uproot
Wooded Kingdom	One of the ledges near the lower area with the Sherms.	Ledge	Link
Wooded Kingdom	Out of bounds on one of the blocks comprising the breakable rock wall.	Ledge	Link
Wooded Kingdom	A short ledge near the top of the large ramp.	Ledge	Link
Wooded Kingdom	A fenced wall above the entrance to the Secret Flower Field.	Corner	Link
Lost Kingdom	The thin strip of ground leading to the butterfly.	Ledge	Link
Lost Kingdom	At the entrance to the room with the Cave Gardening moon.	Corner	Link
Lost Kingdom	The curved corner of the ground outside Captain Toad's location.	Corner	Link
Metro Kingdom	The edge of the entrance door within the Bullet Billding sub-world.	Corner	Link
Snow Kingdom	The Warp Painting platform (often occurs during Snow Dram attempts).	Ledge	Link
Snow Kingdom	An ice formation just outside the entrance to Shiveria Town.	Ledge	Link
Snow Kingdom	A wide corner out of bounds inside an ice pillar.	Corner	Link
Snow Kingdom	The outside entrance to the Cold Water Dash sub-world.	Corner	Link
Snow Kingdom	A ledge on the ground near the entrance to Wind-Chill Cavern.	Ledge	Link
Snow Kingdom	The staircase at the end of Wind-Chill Cavern.	Ledge	Link
Snow Kingdom	The edge of the arena in Snowy Mountain.	Ledge	Link
Snow Kingdom	A corner just below the arena in Snowy Mountain (proven with Cappy only).	Corner	Link
Snow Kingdom	The entrance door within the Icicle Cavern.	Corner	Link
Snow Kingdom	A corner near the entrance in the Icicle Cavern.	Corner	Link
Snow Kingdom	A long edge of the ground near the start of the Icicle Cavern.	Ledge	Link
Snow Kingdom	A smaller edge of the ground near the start of the Icicle Cavern.	Ledge	Link
Snow Kingdom	A corner of ice in the Icicle Cavern. Known as Ice Corner Clip.	Corner	Link
Snow Kingdom	A ledge near where Ice Corner Clip is performed.	Ledge	Link
Snow Kingdom	A section of ground in the back of the Icicle Cavern.	Ledge	Link
Snow Kingdom	The ground near the story moon in the Icicle Cavern.	Ledge	Link
Snow Kingdom	A corner at the end of the Freezing Water sub-world.	Corner	Link
Seaside Kingdom	A short ledge on the cliff just south of the Odyssey.	Ledge	Link
Seaside Kingdom	A small edge next to the ramp leading up to the hot spring.	Ledge	Link
Seaside Kingdom	An upper platform near the hot spring.	Ledge	Link
Seaside Kingdom	A grassy step near the bottom of Rolling Canyon.	Ledge	Link
Luncheon Kingdom	A ground platform at the start of the kingdom.	Corner	Link
Luncheon Kingdom	The bottom of a thin overhanging portion of a wall near the Odyssey.	Other	Link
Luncheon Kingdom	A colored ledge near the slots building in Peronza Plaza.	Ledge	Link
Luncheon Kingdom	The corner of a pillar at the Peronza Plaza entrance.	Ledge	Link
Luncheon Kingdom	A pillar at the south end of Peronza Plaza.	Ledge	Link
Luncheon Kingdom	A pillar in Peronza Plaza behind the Crazy Cap shop.	Ledge	Link	Fire Bro
Luncheon Kingdom	The edge of the pot on top of the slots building.	Ledge	Link	Lava Bubble
Luncheon Kingdom	A tall ledge near the Atop the Jutting Crag moon.	Ledge	Link
Luncheon Kingdom	The entrance to the Magma Crossing sub-world.	Corner	Link
Luncheon Kingdom	A ledge next to the entrance to the Magma Crossing sub-world.	Ledge
Luncheon Kingdom	A ledge near the Surrounded by Tall Mountains moon.	Ledge	Link
Luncheon Kingdom	The side of a thin bridge near the Meat Plateau.	Ledge	Link
Luncheon Kingdom	Near the entrance to the 2D section leading to the Cascading Magma sub-world.	Corner	Link
Luncheon Kingdom	The platform at the start of the Cascading Magma sub-world.	Ledge	Link	Lava Bubble
Luncheon Kingdom	The platform at the end of the Cascading Magma sub-world.	Ledge	Link	Lava Bubble
Luncheon Kingdom	The side of a platform near the start of the peak climb.	Ledge	Link
Luncheon Kingdom	One of the edges of the island in the northeast of the kingdom.	Ledge	Link
Luncheon Kingdom	The floating platform with a moon on it in the Lava Islands sub-world.	Ledge	Link	Lava Bubble
Ruined Kingdom	The corner of a railing next to the Odyssey.	Corner	Link
Ruined Kingdom	The right side of the dragon's head.	Ledge	Link
Ruined Kingdom	Behind the left side of the dragon's head.	Corner	Link
Ruined Kingdom	Behind the right side of the dragon's head.	Corner	Link
Bowser's Kingdom	The top of a roof near the Odyssey.	Ledge	Link
Bowser's Kingdom	The edge of the ground near the seed pot in the Main Courtyard.	Ledge	Link
Bowser's Kingdom	The raised portion of ground with a Spark Pylon on the Souvenir Shop island.	Ledge	Link
Moon Kingdom	The ground next to the entrance to the 2D section.	Ledge	Link
Moon Kingdom	The left side of the ground at the bottom of the steep ramp.	Ledge	Link
Moon Kingdom	The right side of the ground at the bottom of the steep ramp.	Ledge	Link
Moon Kingdom	The east side of the rock bridge along the kingdom's main path.	Ledge	Link
Moon Kingdom	The west side of the rock bridge along the kingdom's main path.	Ledge	Link
Moon Kingdom	The ledge at the end of the rock bridge along the kingdom's main path.	Ledge	Link
Moon Kingdom	The short ramp intended to be jumped from with a Rocket Flower.	Ledge	Link
Moon Kingdom	The edge of the ground to the east of the Quiet Wall.	Ledge	Link
Moon Kingdom	A short wall near the entrance to the Wedding Hall.	Ledge	Link
Moon Kingdom	An ornate cutout near the large door within the Wedding Hall.	Ledge	Link
Mushroom Kingdom	The edge of the ground near the Cookatiel rematch tower.	Ledge	File
Mushroom Kingdom	The corner guarded by the Toad with the Toad Defender moon.	Corner	Link
Mushroom Kingdom	A tree near the tunnel in the northwest of the kingdom.	Ledge	Link