CnC and Tips

The background fits out from the render, The red arm looks horrible with the background.
Basically bad blending, but ill tell you how to fix it.
Use the burn tool on the shitty red arm, go over it with an eraser a bit, 15% flow 10% opacity and go over it about 2-3 times, Then cross over it with Color dodge tool, choose around 10% for this,then go for a black round soft brush then dodge tool that, Then go for the color of the render, which is dark purple so use a soft round brush until it blends in with the render, as for the background.. image/adjustments/hue saturation and go to a dark blue and then bring the saturation down until it blends with your render,

I highy doubt you will listen to this but if u do it will work

Edit: another thing remove the shit text go download some "Text Brushes" they probably call them font brushes,
Using the text tool is shitty, Unless you are skilled with it.
Also, always have your text blending with the background or it fits out and the viewer's concentration is fucked and then he doesn't like the pic