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I'm working on a scene in blender and i have applied emission to a plane as main light source(which is located on the right hand side) and also emission coming from the tip of the candle light object. However when i render it i get these orange dots around the candle emission as you can see in the image. I have tried to up the sampling but they are always there. Any ways to fix this?

enter image description here

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Those are called fireflies, and there are several easy ways to get rid of them. Fireflies are often present in low-light renders. The following are the three easiest.

Clamping

This is probably easiest and best way to combat fireflies. Turn the Properties panel > Render tab > Sampling drop down > Clamp Indirect: value to 3.

enter image description here

Filter Glossy

Turn the Properties panel > Render tab > Light Paths drop down > Filter Glossy: value to 0.5. This blurs all reflective/refractive elements just a bit.

enter image description here

Samples

Sometimes you just need more samples.

All ideas and images from here.

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  • $\begingroup$ Thanks, i always wondered what filter glossy was for anyway! $\endgroup$
    – TheRageMachine
    Jun 9, 2016 at 12:52
  • $\begingroup$ I just tried this but saw no difference, any more advice? $\endgroup$
    – TheRageMachine
    Jun 9, 2016 at 13:47
  • $\begingroup$ @Ulus Can you add a .blend file to your question or comment it? Those should have worked, and if they didn't, I can try some other stuff once I have the file. $\endgroup$
    – Shady Puck
    Jun 9, 2016 at 13:53
  • $\begingroup$ How can I attach .blend file? :) $\endgroup$
    – TheRageMachine
    Jun 9, 2016 at 21:50
  • $\begingroup$ Upload one to Blend Exchange. Is a free, long term site made specifically for blender stack exchange. $\endgroup$
    – Shady Puck
    Jun 9, 2016 at 22:28

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