How can I recreate this Photoshop effect:
Let's say that I have a heart image and inside of the heart I want to implement this effect.
How can this be done?
Thanks in advance.
It will help you to create a pattern and repeat it on the heart image. And last check this halftone tutorial:
If you go with jumbotron effect or halftone effect then light up some areas and you will have a result like the one shown in the picture.
Use a pattern: Make a single "field" (a.k.a. one diamond), then save it as pattern
[Edit] > [Set Pattern]. Then add it as pattern layer and set a light grey layer below it. For further details search for a pattern tutorial in a search engine. For the boundries you could use a vector mask.