Copy and paste the code displayed within the list and paste it when loading a world in "Minecraft 3D v0.5" by scratchfan321 found here: https://scratch.mit.edu/projects/1121865066/ The engine does rely on turbowarp for a bit more of a cleaner/faster experience, but all that is explained within the scratch project's description.
Credits to @scratchfan321 for making such a sophiscated and one of the most well-put 3D engine's/ports I've come across on Scratch, I haven't been on much. I've already spent an hour and a half on a survival world solely just cause, why not, I might own Minecraft but the technical capabilities and the limits that have been pushed is amazing, just gg Scratchfan on your work n dedication.