What does it mean when I Define Foreground, and how does it work?

The entire area defined as Foreground (Tools Tab > Define Foreground) automatically gets copied to what is called the Foreground Region. This region is always positioned on top of all other regions regardless of the number of defined regions a project may have. Generally, you would define areas that obstruct the view of the house, such as foliage and exterior fixtures as foreground. This ensures that all product is applied thereafter will sit behind the defined foreground region, resulting in a realistic rendering of your project.

If there are no items that obstruct the view of the room or house, then there is no foreground to mask and you can skip this step in preparing your project.

When I finish defining the foreground region, why does the red colouring disappear?

This function is normal. The red colouring disappears so you can see the foliage and see a realistic rendering of your project.

I want to remove the tree in front of my house, can I do this?

No, you cannot remove items from a picture. If you have a tree in the front of your house, one solution is to define it as part of the Foreground Region. By doing so, you will retain the look and position of the tree (or any other foliage) in the foreground so when you begin applying product, the product will sit behind the foreground to ensure a very realistic rendering.

Another solution is to simply apply product over the tree (or any other foliage) that appears in front of the house. If you choose to apply product over the tree (or any other foliage), the backgound will bleed through your newly applied product. To eliminate this you can adjust the shading located in the Colours Tab for that particular product layer.