The first step is to measure the exact angle of the inclined plane. You can measure the tilt angle with a goniometer or a hand-held measuring instrument. If you don't want to do this yourself, then you can ask a professional builder to make measurements and suggestions for you.
Then, you can choose the decorative materials suitable for your own wall. For example, if the angle is not too big, you can use three-dimensional wallpaper or murals to cover the oblique angle. If the angle is too large, you can consider installing wooden boards or slates. These materials can change naturally at the angle of inclination, and they can also provide extra texture and depth.
In addition, you can choose to use oblique angles to create a more interesting low-key design. For example, install some niches or shelves diagonally to show your artworks, decorations or potted plants. You can also add oblique lighting, which will increase the sense of depth and enhance the visual effect.
No matter which method you choose to deal with the oblique angle of the porch wall, the most important thing is to ensure that the scheme conforms to your personal preferences and space style, so as to create a comfortable, warm and livable space.