Balancing log
Manufacturer: Broxap
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Length 320 cm
Width 18 cm
Height 200 cm
Polygons - 1446
Vertices – 1540
Material: metal, wood
Model pivot at 0 mark
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In the archive: 2013 and 2016 MAX (Corona+Vray)+OBJ+MTL+FBX
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It is an incredibly engaging activity to try to balance on a rotating log, shifting to one side and moving from one side to the other. In the end, you can almost get tired running in place! Great fun on its own or as part of an obstacle course.
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https://www.broxap.com/rota-log.html 
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If you are using V-Ray versions lower than 3.1, be aware that the materials in the BRDF section use Microfaset GTR (GGX). If your version is older than 3.1, the BRDF field will be empty. Choose Blinn, Phong, or Ward – whichever is preferable for you.
For Corona render, it is recommended to use version no lower than 1.5, as the glossiness of materials is set with PBR considerations.