Mikhail Luzyanin

Unfortunally, constraints that used in the scene not supported. Look at list of supported constraints.

Puzzles do not respect names of nodes in 3dsmax. Unfortunally, theres no way to do it

Unfortunnaly directly controll Color Ramp node, but you can use Mix color with Map Range node that can be controlled via value node.

You can look at Global Illumination, Jewelry Configurator or simple Spinner demo how it made there. You need to look at Change Color puzzles, pay attentioan also as material prepeared in this demos, there’s a special RBG node in materials so the engine can hange the color of this materials.

it’s a z-fighting. Remove faces under that black faces, or try to increase near clippimng of the caera and decrease far clipping of he camera.

You need to use Normal Bump node before connect image to a Bump input of the material.

Yes, HDRI has influence on the scene.

It happens because the origin too far from the bones. Solution is to move origin close to bones or disable Frustrum Culling checkbox on the mesh in a Verge3D settings tab.