I won't comment on anatomy since this post is in the rendering section but anatomy issues are also one of the reasons why rendering is suffering (try to flip canvas to chrck anatomy). Considering following things when rendering: 1. Where is my light source and how many do I have? In this image the skin is colored as if light would shine directly at the couple but their hair and parts of clothing suggest that light is coming from the side. There are also glowing elements like his necklace. All light sources need to be considered when rendering an object, e.g. her hand should leave a shadow on her chest and face and his necklace should add light pink glow to her hair. 2. What sort of shading do I want to go for? Parts of this image are detailed and rendered and other have either flat or nor shading at all (e.g. spikes). The image ends up being all over the place. Considering adding more detailed shading on the parts you want the viewer to focus the most. 3. Same for saturation. Some parts (e.g. his hair and her blue hairstrand) are extremely saturated and other are either too dark or have low saturation. The question is: what do you want the viewer to mainly focus on? Their faces or the colored hair? Generally, shadows are usually less saturated and not just darker color. 4. Always remember we tend to be drawn to lightest color in the image. You have spikes that have 0 rendering and are depicted as white circles - they take away attention from the couple. Metals are in reality black and reflected light that falls on them. 5. Values. For example her hair has 1 value - it makes her head look flat. Head is a sphere so it should have lighter and darker areas. Pro tip: most apps allow you to view image in greyscale. It will help you to see where shading is too flat/homogenous. I added some changes to give a direction. | Artwod Feedback