Newbie to photoshop. Any ideas on how to give this image a more 3-D effect? The purpose of the diamond is for art for a game.
Diamonds are fragmented as prisms. If you want it to appear more 3D you need to find a way to make it appear fragmented. This could be with lines such as:
Or through gradients and shading like this:
Yours looks flat because it is. The entire front is just one piece. You need to add lines and/or shading to create depth to it showing where different fragments are.