Turns out I had some unnecessary Babylon.js settings going on which were hurting performance quite a bit. Thankfully this is resolved now.

But that's not all. Check out the complete changelog:

• added B3D Box and Plane behavior property "Alphablend" useful for textures with transparencies (takes alpha from texture)
• added B3D Box property "Culling" which was previously only present for Plane behavior
• added B3D Box action "Skew box at base" (see Hardliner demo light shaft)
• added B3D Plane "Type" property option "Billboard_Y"
• changed some Babylon.js settings resulting in a considerable performance uplift in most scenarios
• fixed B3D Box and Cylinder behavior assuming incorrect opacity after layout changes
• fixed Baby 3D plugin assuming incorrect rendering after layout changes (blurry geometry edges)
• fixed B3D Box, Plane and Cylinder behavior internal naming (used to show up as noname in Babylon.js debug layer)