1. First, we open two pictures in PS, drag one of them onto the other picture, and adjust the position and size.
2. Next, we will create a "mask" on the layer (black means invisible and white means visible);
3. At this time, we select "Gradient Tool" and select the gradient color from "white to black", as shown in the red box below;
4. From right to left, pull the gradient, and choose a suitable position to pull the gradient until the two pictures are perfectly blended;
5. Now we can look at the final integrated renderings.