Enter the right-most speed block, to where Samus is fully within it and between 0 and 5 pixels from the left edge of the block. This is when Samus enters the screen again and then moves right so there is just over one full tile gap between her and the left edge of the screen. Alternatively, go past that and press against the left edge of the top stair, then jump up to the next stair and move left exactly or slightly less than 2 tiles. Exit G-mode while inside the speed blocks then X-Ray climb up. The camera will move up slightly once Samus is high enough, as she is pushed up from a slope below the door. Stand up one more time, face left, then perform a turnaround buffered spin-jump away from the door to trigger the transition.

Note that it is possible to be slightly left of this range if a low transition is usable in the next room, or if very precisely timed X-Ray climbs are performed while inside the door transition to prevent triggering it.

Requires:

"h_heatProof"
"canComplexGMode"
"canOffScreenMovement"
{
  "noBlueSuit": {}
}
"canGModeXRayClimb"
"canLongXRayClimb"

Bypasses door shell: true