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sadhoney

Fade Color of Circle under Generator

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Hello - I'm generating circle splines and growing them up. But I'm stuck on how to fade color to transparent. I have an xpMaterial on xpGenerator but playing with transparency over time doesn't give me what I want. And if I move the xpMaterial onto the emitter the entire circle volume is rendered instead of just the spline.

 

thks for help if you can!

RandPuddleSplashesParticles.c4d

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Do you have Cycles 4D?

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  • No, I don't have Cycles, just use physical

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    This and all materials, especially complex ones are a piece of cake in Cycles. Is this what you are trying to achieve?

     

    RandPuddleSplashesParticles.c4d

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  • Not exactly - I see you keyframed transparency in the material, which changes transparency of all the particles the same way. ie. at any given time the transparency of all particles is exactly the same. I guess what I really want is that transparency to fade in relation to how old each particle is, so at any given time the particle transparencies will be different depending upon how old they are.

     

    Thanks for your help on this.

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    You can use my material with an xpColor modifier.

     

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  • I'll try xpColor modifier.

     

    I also solved this way: Use an xpSprite disk with huge inner radius so it looks like a circle spline. Put a regular material on it. Then, in the Transparency channel use xpSpriteShader and attach the xpEmitter to it - then just need to select Mode = 'Parameter Dependent' and choose paramater = particle life and use B/W gradient.

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    Very clever!

    Can you post the file?

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  • Here's the way I did it - if you increase particle lifetime you can see the transparency effect a lil better

    RandPuddleSplashesParticles_xpSprite.c4d

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    Way to go! They fade out instead of popping at death. You taught me some new tricks. Thanks

    It is frustrating to me that the Insydium site is such a ghost town lately and there is no great place to share files and knowledge. It is really fun to share tricks and problem files. There was a real guru there named Lothar but he has disappeared as of late. I learned a ton from him and have a great collection of his example files.

     

    Over the years C4D Cafe has been the main source of my learning about C4D.

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