Light in space .. "stars" sun etc

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voon
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Posts: 527
Joined: Tue Dec 17, 2013 6:37 pm

What's the way to do this in Octane? I have a spaceship. I put a plane with an emission texture behind it .. a planet surface etc, nicely glowing. but since this is space, I set the generic light in the texture environment to 0.01 (the minimum) to have truly black space. Now obviously my ship is black against the bright background planet and I need to light its other side up. I tried a large plane with insane power (60'000 etc) but that looks pretty bad and bland ..... how do you emulate a sun properly?
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grimm
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Location: Spokane, Washington, USA

This will work in Octane 2.0 or newer. Set the environment to daylight, set the sky texture to RGB color, then set the color to black (0,0,0). Black sky with a sun. :)

Fun! :D
spacesteam.png
Linux Mint 21.3 x64 | Nvidia GTX 980 4GB (displays) RTX 2070 8GB| Intel I7 5820K 3.8 Ghz | 32Gb Memory | Nvidia Driver 535.171
xxdanbrowne
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Joined: Wed Feb 06, 2013 2:38 am

Quite cool. Using your effect (black background texture with sun) I got this:

Image
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grimm
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Joined: Wed Jan 27, 2010 8:11 pm
Location: Spokane, Washington, USA

Excellent! :) Did you use a texture for the back ground? I didn't try that, anyone have a cool space HDRI? Also what kernel did you use?
Linux Mint 21.3 x64 | Nvidia GTX 980 4GB (displays) RTX 2070 8GB| Intel I7 5820K 3.8 Ghz | 32Gb Memory | Nvidia Driver 535.171
xxdanbrowne
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@grimm,

Thanks, just playing around. Yes I used a texture of a space background I got from somewhere.
voon
Licensed Customer
Posts: 527
Joined: Tue Dec 17, 2013 6:37 pm

Ohhhhh, this is cool and might solve my issues, thanks for mentioning it :)
voon
Licensed Customer
Posts: 527
Joined: Tue Dec 17, 2013 6:37 pm

How can I reduce the suns power? I try to emulate faint Starlight, while maintaining the color of the backgroundtexture (space nebulae etc). Reducing the strength also reduces the brightness of the background texture, not only the sun, which is undesired. Making a smaller sun didn't help much, either?
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