I'm not good at English so I'm not sure if this title is clear enough.
I've try to figure inskape since long time ago, but seems cant control it very well.
I think inkscape (maybe it's SVG's problem) need to introduce something like gradient mesh or diffusion curves formally.
I'm troubled with the basic essensial need of these feature! It makes easy jobs harder to done. And don't know why they are still not standard these day.
For example if I want to make a perspective effect, gradient is sure not going to do things right.
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However, I found something to workaround (strictly to say, everyone know blur simulate like gradient, but maybe this method will makes it easier to create.).


As you can see, I create the mesh to define the color on each block more precise, so the final effect is more realistic.
When I use the traditional method -- keep adding linear or radial gradient on the surface and keep overlay on it, this sometimes realy cumbersome, and the final effect is not always what I want.
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I still think blur and gradient is two kinds of thing, blur will have transparency issue, and I'm not sure if blur consume more cpu resources then gradient. So gradient mesh still needed to include in SVG standard.
If someone have better way to make these smooth gradient works, please teach me, I'd love to know, thanks.