First of all, you should consider the color difference between the material picture and the background picture, and you can make them close by adjusting the hue and other means. Lay the foundation for the next integration. (Brightness and contrast should also be adjusted appropriately, as the case may be. )
Then you can play freely, use feathering selection to intercept the material, or drag it directly into the material and then mask, erase, choose the mixed mode, and try whatever works. It depends on the landlord's own preferences.
Having said that, in short, in order to make the two pictures perfectly integrated, we must first achieve the unity of colors, that is, the contrast, lightness and hue should be similar.
I hope it is useful for you. Use masking and feathering to make the seams of the two pictures fit perfectly, as follows: When ps is masked, it is necessary to show that the transparency is not high, and adjust the transparency. When you erase everything, you can use this part as a selection and use the Gaussian blur tool to blend perfectly. Actually, it depends on your own photos! You must remember that there must be obvious contrast between the characters and the background! For example, people wear black clothes, but the background is white, so it's easy to button out the characters, but the clothes of the characters are white and the background is white, so it's hard for you to button out the picture! Therefore, if you want to merge the character pictures into the background pictures, you must first deduce the main body of the character. Drag it directly into the background painting! However, if you don't have a good figure, the edge of character is certain. Makes people look fake. So here we need to adjust the hue saturation curve and so on! But I think it's best to use the original background. Select-Feather-Paste!