How to draw a good indoor line draft?

Start writing with a pencil, first accurately draw the indoor perspective, then draw the objects and decorative effects, and finally erase the useless lines, and then use other heavy-colored pens to construct lines and markers to color. The picture will also look clean and tidy.

As for sofas, beds and the like, there are many materials and pictures everywhere for your reference. You can find a few related pictures from multiple angles to copy, then memorize them, and then you can easily handle them when drawing the renderings.

The same is true for furniture grades. Find more relevant excellent works, carefully observe how others deal with them, and then copy more memories. As long as you remember the key points, you can add and subtract other details yourself, so that you won't be at a loss after practicing for a while.