In this blog post I describe a method to edit interior photos. Here is the photo of a hotel room straight out of the camera. There are a number of obvious issues with this photo. The first step is to prioritize them based on how much time you want to spend on it. I have decided to spend at most 10 minutes on it. The most glaring issues to me are:
Uneven color temperature
Lines not straight
I used Adobe Lightroom to tackle the first issues. I am using Lightroom 5 but the steps should be applicable to any versions of Lightroom. I bring down the highlight to reduce brightness of the lights. I then boost shadow to recover some of the details on the carpet. I used a few graduated filters (short cut is M) to fix the exposure, color temperature and contrast. I did one graduate filter from the top right to the bottom left, and another filter from top left to the middle. Here is the result of the Lightroom edited interior photo below.
Next, I opened the photo in Photoshop to address the wonky walls. Notice that the wall close to the doors are tiled to the left. In Photoshop, I used the perspective tool to slightly shift the wall back in position. You need to be careful to not over do it, otherwise the furniture will look wonky. The perspective tool is under the Edit->Transform menu item. Another useful tool to edit interior photos is the skew tool. I recommend trying both tools out for the best result.
Here is the final photo. There are other things that you can do to enhance this photo. But for 10 minute of work it is not bad. I hope this will give you a good start on how to edit interior photos.
For reference, I shot this interior photo using a Canon 6d with a Canon 16-35mm F2.8 II lens.