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. 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"
{
  "noBlueSuit": {}
}
"canGModeXRayClimb"
"canLongXRayClimb"

Bypasses door shell: true