Several of the links below are affiliate links. If you choose to make a purchase, I will earn a small commission. This commission comes at no additional cost to you. I recommend these products or services because I have found them to be helpful and useful.
3D Design Software for Interior Designers
SketchUp Make is a free 3D modeling software available from Trimble. It is very easy to get started in SketchUp, and there are tons of resources available for learning it, including right here on my blog. A Pro version is also available for a yearly fee. If you are serious about creating accurate and professional construction documents, you will need to purchase Pro. Photorealistic renderings can be achieved through third-party plugins and software.
I learned Revit while in graduate school for interior design and used it when I worked for a design/build firm here in Des Moines. Revit is a comprehensive BIM program and is used by both small firms, like the I one I worked for, and extremely large architecture and construction companies.
As a computer nerd, there are many things I love about Revit, particularly the ability to easily build parametric models. I also find rendering in Revit to be easier and faster than other programs, especially with their cloud rendering option.
I personally use the Chief Architect Premiere version and love it. I started with the Interiors version, but I found it lacking some of the functionality I needed for more custom kitchen and bathroom design. You might not need the full version, so you should evaluate the options carefully before purchasing.
I highly recommend subscribing to the yearly software and support license. I let my license lapse and eventually needed to upgrade, which cost almost $1000 because two years had passed.