本3D模型合辑是由rendering机构出品的屋顶通风系统3D模型合辑，R&D Group iRooftop，大小：185.73 MB，格式：.max Vray，包含150个屋顶通风系统3D模型。CG数据库整理。

R&D Group iRooftop

More than 150 models of various roof top items

High-quality textures

A relatively small number of polygons with high level of details.

In 3ds max format (2009 and higher) with V-ray and Standard materials

In Cinema4d format with V-ray materials

详细模型内容包括：

iRooftop collection include the following 3d models :

HVAC Ventilation and various air-conditioner units and pipes

11 types of Aerials (antennas)

11 x Chimneys

3 x drain pipes

4 x window cleaning gondolas

5 x Elevator shaft tops

8 x roof exits

6 x fire staircases

4 x flagpols

4 x telecoms mast

4 x hazard lights

6 x telecoms aerials

11 x roof fans, including spherical without motor roof fans

14 x roof windows and light well windows

2 x helicopter landing pads (helipad)

2 x roof sewer tube

2 x roof tanks

10 x satellite dishes

6 x solar panels

8 x spot lights

10 x supply fans

4 x vanes

and other Misc rooftop elements like roof chairs, parasols, BBQ, watertanks, ventilation tubes, climatization systems and antenna.

All objects in the scene are named, real world scale and reseted Xform. Vray and Vray materials are used.