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Renderings, elevations, sections, can be seen in height, floor plan is not visible furniture height, but the general furniture height is about the same, to be ergonomic, there are standards.
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Renderings are OK, but floor plans are not.
You can go to Nick Tu.com, Zhan Ku, Material China, etc. to collect it.
The second way is that you take a piece of furniture CTRL J on the first layer of CTRL U with the lowest brightness black, and then turn down the transparency in the Layers panel.
It's all personal style, if you want to draw a standard and more professional looking drawing, you have to study how the wooden keel is arranged, the general spacing is 400, and there is also a light steel keel arrangement.
There will be a lot of them, so pay attention to the PSD mode, because there are other software inside.
It should be according to the direction of the light, but the renderings should be projected lightly, so as not to affect the quality of the renderings. Make customers unhappy.