Street art is an amorphous beast encompassing art which is found in or inspired by the urban environment. With anti-capitalist and rebellious undertones, it is a democratic form of popular public art probably best understood by seeing it in situ. It is not limited to the gallery nor easily collected or possessed by those who may turn art into a trophy.

Some people argued that street art is illegal, but generally legal distinction between permanent graffiti and art is permission. This topic becomes even more complex regarding impermanent, nondestructive forms of graffiti .

With permission, traditional painted graffiti is technically considered public art. Without permission, painters of public and private property are committing vandalism and are, by definition, criminals. However, it still stands that most street art is unsanctioned, and many artists who have painted without permission, have been glorified as legitimate and socially conscious artists.

There are a lot forms of street art, for example: traditional, stencil, sticker and video projection.

Traditional: painting on the surfaces of public or private property that is visible to the public, commonly with a can of spray paint or roll-on paint. It may be comprised of just simple words or be more artful and elaborate, covering a surface with a mural image.
Stencil: Painting with the use of a homemade stencil, usually a paper or cardboard cutout, to create an image that can be easily reproduced. The desired design is cut out of a selected medium, and the image is transferred to a surface through the use of spray paint or roll-on paint.

Sticker-Propagates an image or message in public spaces using homemade stickers. These stickers commonly promote a political agenda, comment on a policy or issue, or comprise an avantgarde art campaign. Sticker art is considered a subcategory of postmodern art.

Video Projection- Digitally projecting a computer-manipulated image onto a surface via a light and projection system.

Personally, i think we should try to find different forms of street art in sydney, take some photos and make a video for our next assignment. Here is a video i found from internet, think it is a good example.