Forums Technical Discussion Motion Blur & Alpha of Explosion Render in Mantra

Motion Blur & Alpha of Explosion Render in Mantra

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GU
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Hi Guys!
i'm having trouble on rendering my Explosion.
　　
　　When I render the explosion with the ground they behave normally




but when I render the explosion alone, it becomes like this




I don't know if it's because of the open blur that affects the edges and becomes a bit transparent or something.


Ａny idea on how to solve it?
Edited by GU - May 30, 2022 02:47:35

Attachments:
orig2_alpha.JPG (69.7 KB)
orig2.JPG (131.0 KB)
orig_explo.JPG (219.3 KB)

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sajadalavi
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Is your motion blure on?
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GU
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sajadalavi
Is your motion blure on?
Yes, i need to turn on motion blur at work
Edited by GU - May 30, 2022 02:46:44

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MOTIOBN.JPG (20.6 KB)

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sajadalavi
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Is it still the same if you turn off motionblur?
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sajadalavi
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If everything works out without motionblure, you have two options:
1. Render without motionblure and in the composite step, add motionblure.
2. With volume wrangle, multiply the vel vector by a number less than 1, for example 0.2, and control this motionblure.
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GU
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sajadalavi
Is it still the same if you turn off motionblur?
I have rendered one without motion blur, it becomes like this,looks correct
Edited by GU - May 30, 2022 08:30:27

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alpha.JPG (68.2 KB)

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GU
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sajadalavi
If everything works out without motionblure, you have two options:
1. Render without motionblure and in the composite step, add motionblure.
2. With volume wrangle, multiply the vel vector by a number less than 1, for example 0.2, and control this motionblure.
Ok, i think i will try it again, thank you for your valuable comments!
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