Many different materials will be used in the collapse, instead of just paper. Different materials can enrich the texture and stereoscopic sense of the picture. For example, blue lines can be used for running water, burnt paper will feel like ruins, and materials in life can be tried. The use of watercolor is also very extensive, which is suitable for the halo dyeing of the background and will not make the screen become blank and monotonous. You can use watercolor paper as the paper of zine