Looking at God is foundational to building a theology of beauty. God is beautiful in His glorious holiness; however, because of sin we fail to see His beauty. In Christ we are given restoration and are called to ourselves be holy. Understanding this is crucial to curbing the modern threats to seeing this beauty.
Modern art and culture often includes nudity. The author of this article discusses how nakedness took on a new meaning after the Fall. Nakedness was no longer a sign of beauty and perfection, but rather of sin and unholiness. Therefore, there is no justification or reason for having nudity in art or culture.
One of the duties of the Christian is to apply our minds in imagination. The mind is used for much more - observation, analysis, organization, memorization, etc. But imagination is different. Imagination helps explain what is not seen, but is out there.