My CnC this time would be go read tutorials and a lot, this is just bad to be honest. There is no blending and flow in this siangture and the background looks bad.
Sorry if I sound harsh here dude, but I have to agree with Eternity's comment here^^ that shift filter you used completely ruind the focal. The whole point of the render is to make it stand out from the rest of the sig i.e your focal point it also looks really LQ.
Depth- there is no depth what so ever so the sig, so it looks really flat try to find a background that suits the render then bulr some parts of the background, and play around with lighting and shading this will help create some depth in your sigs.
Flow- again there is no flow at all, just flowers placed randomly on the signature find some nice fractals and place them where you think it looks good then try to create some flow. You can also use a background that already has some flow going on, but try to follow the flow of the render you are using.
Lighting- also very bad, the render appears to be bright but there is no light source so it doesn't look realistic. There are several ways to create a light source you can try using a soft brush on a low opacity and brush where the light should be coming from. Or you can use fractals or effect c4d's, but regardless of what you use it needs to look natural and realistic also use the correct colors.
Blending- again its the same as the rest there is no blending at all, everything is clashing use colors that compliment the render and each other don't just pick the first color you see. Use adjustment layers,effects,colors,and lighting and shading to help with blending there are several ways of blending so find what works for you and go with it.
Again sorry if I sound harsh, but you won't get better if you don't no what you are doing wrong have a good read of this guide
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its pretty long but its well worth it. Its very detailed about what is needed to make good sigs, also I know it says phototshop but the same basic principals apply regardless of what programme you are using, anyways hope this helps.
