They show us dimensions hidden within us, our other selves. If we take notice of the poetry of reflections, we discover another world of possibilities within our own. Many times, when creating images with Photoshop, one is faced with creating reflections in order to make the new visual realities we create more convincing. In a few rare cases, the reflections themselves become the content of the image. When it comes to reshaping image content to create reflections, the capabilities of Photoshop vary.
Linear transformations are quite easy to achieve.
It is a simple matter to flip, skew, stretch, push, or pull an image. As with any distortion, when the image is enlarged new pixel information must be invented by upsampling. As downsampling yields higher quality information than upsampling, for the highest quality, favor making things smaller rather than larger. At times this may mean making your original scan larger than your expected final image size. Non-linear transformations are much more challenging.