How can I make Fills look smoother?

[mezm]

When I create fills with linear and rainbow effects in Xara they look just the way I want them to look. However, when I export the drawing in png format and upload it to my server making it the background image of my website, there seems to be lines or creases. How can I smoothen the image so that the color flows nicely like it does in xara extreme pro? In my website, you'll see lines that do not appear in the original drawing in Xara extreme pro.

[Odat]

Your PNG file is using 8 bit (256) colors. You might have better luck with it if you export it as truecolor instead.

[gwpriester]

Welcome to TalkGraphics

As in JPEG.

Or export using Error Diffusion Dithering which blends the pixels together to make a smoother transition.

[mezm]

Thank you both for your help. What an improvement! And the background image is almost as smooth as I want it to be. I'll try to smoothen the image out more this weekend.