Lots of detail, instantly recognisable

Detail but subject size is getting small

No detail will be achieved

Images in dark conditions can work, the further back the subject is, the less detail will be achieved. The people at the back of this example will have less detail than those at the front.

The example image has a lack of contrast as it is predominantly one colour. This would lead to a lack of definition in the engraving.

The extreme shadowing across the example image makes it unsuitable.

Images with snapchat filters may not be suitable.

Great image, even lit with lots of brightness and contrast

This image is in light shadow, we would achieve a good image. The more in shadow, the less detail achieved.

The light on this image is shining left to right obscuring people furthest left. We would achieve less detail on those to the left of this image.

The light on this image is behind the subjects placing them in shadow and offering no brightness or contrast. This image is unsuitable.