I don't think Babylon.js supports alembic files. If not I'm thinking of parsing it and processing the vertex transformations myself.
I know you can change vertex positions and normals easily in Babylon.js using
mesh.updateVerticesData(BABYLON.VertexBuffer.PositionKind, newPositions);
mesh.updateVerticesData(BABYLON.VertexBuffer.NormalKind, newNormals);
but I think this is all done on the CPU. Is there a way to get these updates per frame to happen on the GPU?