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POSVG transparency with multiple gradients
 

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  1. POSVG transparency with multiple gradients
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    <p>I am trying to find out the optimal model for 4-way gradient filling. My latest model is <a href="http://jsfiddle.net/BfPZW/1/" rel="nofollow noreferrer">this</a> fiddle:</p> <pre><code>&lt;svg height="360" width="400" xmlns="http://www.w3.org/2000/svg" version="1.1"&gt; &lt;defs&gt; &lt;clipPath id="C"&gt; &lt;path d="M 100 200 L 300 58 L 400 250 L 300 341 Z" /&gt; &lt;/clipPath&gt; &lt;radialGradient id="G1" cx="50%" cy="50%" r="50%" fx="50%" fy="50%"&gt; &lt;stop offset="0%" style="stop-color:rgb(255,0,0); stop-opacity:1" /&gt; &lt;stop offset="100%" style="stop-color:rgb(128,128,64); stop-opacity:0" /&gt; &lt;/radialGradient&gt; &lt;radialGradient id="G2" cx="50%" cy="50%" r="50%" fx="50%" fy="50%"&gt; &lt;stop offset="0%" style="stop-color:rgb(0,255,0); stop-opacity:1" /&gt; &lt;stop offset="100%" style="stop-color:rgb(128,128,64); stop-opacity:0" /&gt; &lt;/radialGradient&gt; &lt;radialGradient id="G3" cx="50%" cy="50%" r="50%" fx="50%" fy="50%"&gt; &lt;stop offset="0%" style="stop-color:rgb(0,0,255); stop-opacity:1" /&gt; &lt;stop offset="100%" style="stop-color:rgb(128,128,64); stop-opacity:0" /&gt; &lt;/radialGradient&gt; &lt;radialGradient id="G4" cx="50%" cy="50%" r="50%" fx="50%" fy="50%"&gt; &lt;stop offset="0%" style="stop-color:rgb(255,255,0); stop-opacity:1" /&gt; &lt;stop offset="100%" style="stop-color:rgb(128,128,64); stop-opacity:0" /&gt; &lt;/radialGradient&gt; &lt;/defs&gt; &lt;ellipse cx="100" cy="200" rx="200" ry="200" clip-path="url(#C)" fill="url(#G1)" /&gt; &lt;ellipse cx="300" cy="58" rx="200" ry="200" clip-path="url(#C)" fill="url(#G2)" /&gt; &lt;ellipse cx="400" cy="250" rx="200" ry="200" clip-path="url(#C)" fill="url(#G3)" /&gt; &lt;ellipse cx="300" cy="341" rx="200" ry="200" clip-path="url(#C)" fill="url(#G4)" /&gt; &lt;/svg&gt; </code></pre> <p>which comes with result:</p> <p><img src="https://i.stack.imgur.com/LGx5m.png" alt="enter image description here"></p> <p>But when I change order of <code>&lt;ellipse&gt;</code> elements (see <a href="http://jsfiddle.net/dq9PH/1/" rel="nofollow noreferrer">this</a> fiddle):</p> <pre><code> &lt;ellipse cx="100" cy="200" rx="200" ry="200" clip-path="url(#C)" fill="url(#G1)" /&gt; &lt;ellipse cx="300" cy="58" rx="200" ry="200" clip-path="url(#C)" fill="url(#G2)" /&gt; &lt;ellipse cx="300" cy="341" rx="200" ry="200" clip-path="url(#C)" fill="url(#G4)" /&gt; &lt;ellipse cx="400" cy="250" rx="200" ry="200" clip-path="url(#C)" fill="url(#G3)" /&gt; </code></pre> <p>result changes to:</p> <p><img src="https://i.stack.imgur.com/ac1Dq.png" alt="enter image description here"></p> <p>Which means transparency is not calculated same way. I would like to have transparency calculated always with same results, regardless of order of the elements. What is a solution for this issue?</p>
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    1. USlambda
    1. USΩmega
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    1. COI'm not sure why you expect the result to not be different? You don't have anything which is fully transparent, of course it's going to look different if you have a different element on top.
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      1. USrobertc
    2. CO@robertc - looking for solution where elements will not be ordered, so nothing would be on top of others, within same layer, equal, ...
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      1. USΩmega
    3. COThe elements are always ordered in SVG.
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      1. USrobertc
 

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