Good point. But it would be cool to be able to do the alien stuff, especially when 2.90 lands and then still more of the everything nodes project.
And I am not sure that it would hurt to give the user more options. Better to let the user decide what can be done than restrict the functionality because one does not see the value of possible âunorthodoxâ uses.
1 Like
Exposing a vector control is a huge step forward IMO, well done @nacioss!
I donât think alien stuff is the only application of being able to drive these nodes. The other parameters could be controlled by a node graph to give a user more automatic control of the look, no reason not to have inputs, since the value can still be changed on the node itself.
9 Likes
Great job! Thanks for keep developing this.
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damn i hope it can be in 2.9
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me too, at now is from cycles implementation that i wait this sky setting, a lot of years
Since taking into account 81 wavelengths versus 11 wavelengths of the color spectrum doesnât give any noticeable difference, then now the model is making use of 11 wavelengths instead of 81 which gave a good speedup.
81 wavelengths
11 wavelengths
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This model doesnât seem to properly support rendering spaces other than linear-sRGB/rec709? XYZ to rendering space conversion needs to be pulled from OpenColorIO(same way the current sky texture does) rather than hard-coded, otherwise the output colors will be wrong with things such as ACES.
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The sphere can be a real PITA to fine tune - this looks much better! The only real great use was that it was drivable based on a sun lampâs rotation, but with your vector socket it should be even easier. Thanks!
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This might be a really silly question considering how early both of these projects are but Iâd like to know: How easy or hard would it be to write this same model to work spectrally? It looks like the Spectral Cycles branch might be getting close to support such ideas and it would be really cool if these two efforts were cross-compatible.
A better sky model is something Iâve been waiting for for a long while now. The current one leaves a lot to be desired. What you have going here looks excellent so far!
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Thank you sir, yes Iâm in touch with the spectral guy 
and yes, this model will be ready for the change, donât worry
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I also hope youâll reconsider making the sun disk size adjustable. @LudvikKoutny is very much correct that itâs important for just art directing shadow size or making an efficient way to mimc partially blocked sun. Also, modifying a sun/sky model IS the most effective way to produce non-earth skies in most cases. You usually get much better results just putting non-physical values into an earth-sky model, and possibly changing colors with things like the existing HSV node. Expecting artists to roll their own models for alien sky or just hand-make something with gradients is usually a poor solution.
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Precomputation finished!!
Now the model renders superfast!! Even faster than the actual Hosek-Wilkie method!!
The only time required is the precomputation part which happens before the rendering starts, this process takes up to 1 second, but then the sky renders super fast, instantly!
32 Likes
I prefer sliders over the sphere controller by far. Much finer control imo
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That is really cool! Looking forward to seeing it in next Blender releases!
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Is there a reason for the noisy look? Luxcore is slower doing pure pathtracing and doesnât have as much noise.
Viewport is setup to 10 samples, iâd say noise is kinda expected
