Hey guys
I rendered this in 16-bit and still got this issue, not exactly sure how to name it, but the ‘gradient’ of the backdrop is not ‘drawn’ well/smooth… Any idea why this might be?
(I don’t wanna show my model just yet (haha) so I cropped it, I hope you’ll see what the issue is, without the context, well, the bottom has these huge stripes, instead of a smooth gradient…)
Cheers
Hard to say only from this image mate … send the .blend file (for sure without the models U dont want to show…)
JayMFor the backdrop you have set the subsurf modifier subdivision value to 4 for the viewport but only 2 for the render
Subsurf level 2
When set to level 4 you get
The backdrop is also using flat shading not smooth shading
Also check your compression ratio – 2% seems very, very low, general around 90% is used. The more compressed an image (even for PNG format) the more data gets lost in the rendering, and gradients are very sensitive to this.
Ah right Rich… shows that I am not used to render much…
Cheers chipmasque! Yeah, I got it the other way around, thought 2% value would not compress at all 
yep, before Ive got some free time to answer this enough was said from the others so PROBLEM SOLVED.
JayM