Showcasing your interior design portfolio with interior photography is important for several reasons:

1. Marketing and Advertising: An interior design portfolio serves as a visual representation of your work and can be used to attract new clients and promote your business. It can be used to showcase your skills, style, and approach to design, and can help potential clients to visualize what you can do for them.

2. Building Credibility: A well-presented portfolio can help to build trust and credibility with potential clients and employers. It demonstrates that you are a professional with a proven track record of successful projects.

3. Personal Branding: A portfolio can help to establish your personal brand and set you apart from other designers. It can help to communicate your unique vision and approach to design, and can help to differentiate you from your competition.

4. Networking: A portfolio can be used as a networking tool to connect with other professionals in the industry, such as architects, contractors, and other designers.

5. Job Applications: A portfolio can be used as a tool to showcase your skills and qualifications when applying for jobs.

Overall, showcasing your interior design portfolio is a powerful way to promote your work, build credibility, and attract new clients and opportunities.