Who the fuck said that interior design must have realistic 3D renderings? It doesn't matter whether it can be 3D or not.

You should remember that renderings are just an expression of interior design.

Since you can draw by hand, you should know this very well, so you can express it by hand. Note that a good designer can't use 3D, but only hand-painted, so don't throw away your hand-painted. This is countless times more important than 3D.

This is why people who come out of the training school can only make renderings, but can't do interior design. They are from professional art colleges and have a solid foundation.

This is the difference