Click to read more on it. Also know, how could a mirror be used to project an opaque picture?
An opaque projector works by shining a bright light onto a nontransparent object. The light is reflected from the object and through a series of mirrors or prisms and a lens. This allows the user to enlarge and transfer an image from a small, opaque source to a larger surface such as a screen or canvas.
Similarly, do muralists use projectors? Using projectors for making mural can help you with various stages of your painting. Projectors work as a guide. They are reliable and produce a better output while saving a lot of time, and that is the reason why more and more artists have started using them.
Keeping this in view, what are the two drawbacks to using the opaque projector?
Disadvantages:
Do artists use projectors for portraits?
By adjusting the projector, either up or down, the image can be made different sizes, allowing artists to control the size and composition of their drawing. Using a projector is highly controversial in the art community. Many feel that using a projector is cheating, and by using it you are no longer drawing.