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My render

Hello! I am a Blender 2.8 beginner. I want that little sphere at the back to act like a Sun and light up some of the background, kind of like this:

Reference

But I have no idea how to achieve that. Can somebody please help me?

Also, any other advice or criticism is welcome.

Thank you

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  • $\begingroup$ If your sphere has an emission material, go to the render settings tab (the one that looks like a little camera), and enable "Bloom". You may have to increase the emission strength to make it "glow" the way you want. $\endgroup$ Commented Jul 20, 2020 at 14:56
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    $\begingroup$ It worked. Thank you @ChristopherBennett $\endgroup$ Commented Jul 20, 2020 at 15:36

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Firstly, that sphere is not lighting up the background. The background appears to be an HDRI and the HDRI lights the scene, the scene does not light the HDRI. The effect that you want is glow (aka bloom).

If you are in Eevee then you can give that sphere an emission shader and turn on bloom. and that is the only step. If it does not appear change the emission value or change the values of the bloom.

If you are in Cycles there are two options (probably more, but these are what I know).

First way is to give it an emission shader set to any ammount and set the render passes to include Emission. Then in the compositor use a gleam node set to something like fog glow.

The second way is to render it twice (this is the slow method unless you have a good computer or little geometry). Render it once in Cycles for the high quality render and again in Eevee (at the same resolution and settings except maybe samples which can be turned down). In Eevee set the render passes to include bloom. In the compositor combine the Eevee bloom pass with the cycles render with a MixRGB node set to screen or add.

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  • $\begingroup$ It worked. Thank you so much $\endgroup$ Commented Jul 20, 2020 at 15:20

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