Final answer:
Artistic techniques such as Hishida's use of texture and negative space, and Tayou's unconventional materials, create visual effects that invite the viewer to contemplate natural and artificial elements and consider environmental themes.
Step-by-step explanation:
The descriptions provided refer to artistic representations that likely belong to a description of visual art or art history, possibly discussing the techniques and impacts of a particular artwork. There is a mention of Hishida's painting, where the use of detail and negative space create an illusion of depth. Tayou's installation, meanwhile, uses contrasting materials to make a statement on consumerism and environmental impact. These descriptions could be analyzed for the effect they are meant to create in the viewer of the art, suggesting a contemplation of the natural versus the artificial, as well as the impact of human activity on the environment.