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If you meant more powerful in terms of potential performance gains because it is written in c++, then -- https://github.com/markaren/threepp
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https://armory3d.org/features is more of a game engine than just a 3d renderer but not as advanced as unity or unreal in certain aspects. One can write game logic in c/c++/rust -- https://github.com/armory3d/armory/wiki/wasm
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.