Staircase normal Free 3D model

This 3D model was originally created with Sketchup 13 and then converted to all other 3D formats. Native format is .skp 3dsmax scene is 3ds Max 2016 version, rendered with Vray 3.00 Staircase, Holztreppen, Stiegen, Escalera, stairs, лестница, mortise stairs, interior stairs,