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  1. #1
    Member Robsorb's Avatar
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    Volumetric clouds

    Interesting what your able to create by just basically plugging a musgrave texture into a volume scatter node and adding some math node trickery.
    Name:  t2.png
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    After I'm done cleaning up my workflow I'll give you guys an overview of what I did.



  2. #2
    Wow, pretty nice result. I tried getting clouds like that and never really succeed.



  3. #3
    Member NRK's Avatar
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    We spend years in school to prepare for this life... how much time have we spent preparing for the next?

    My long term Film Project:Glasses the Movie



  4. #4
    Member Robsorb's Avatar
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    Thanks for you guys' comments.

    Your generator looks interesting. Basing the clouds on particles or vertices has some huge advantages. I managed to achieve the same thing however using my own method.
    Click image for larger version. 

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    Hopefully you don't mind me being critical of your creation but I think that just using the noise texture doesn't look quite right. I think you should use at least a musgrave texture (maybe in combination with other textures). This in combination with some other settings might allow the cloud to move a little bit more away from the main shape and to generate some macro details. Multiplying the texture with the point density also doens't help much, it creates a kind of cutoff effect at the edges. Please tell me if you disagree on anything or would like to add something.

    I'll upload my setup soon. I've just been changing it a lot.
    Last edited by Robsorb; 15-Nov-17 at 12:16.



  5. #5
    Member Robsorb's Avatar
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    My current setup

    Base material:
    Click image for larger version. 

Name:	Screenshot 2017-11-15 18:27:48.png 
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    Cloud texture group:
    Click image for larger version. 

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ID:	505321
    Click image for larger version. 

Name:	Screenshot 2017-11-15 18:28:48.png 
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ID:	505320

    Sigmoid scale/offset group:
    Click image for larger version. 

Name:	Screenshot 2017-11-15 18:28:48.png 
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ID:	505320

    The sigmoid group is just a sigmoid function: y = 1/(1 + e^-x)
    Last edited by Robsorb; 15-Nov-17 at 13:35.



  6. #6
    Member Robsorb's Avatar
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    Variables

    Here's a quick overview of all of the variables of the cloud texture group:
    Click image for larger version. 

Name:	Variables.png 
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ID:	505325
    Static values: Contrast: 10, Offset: 0, Bounds scale: 0.3
    Last edited by Robsorb; 15-Nov-17 at 13:37.



  7. #7
    Member SandraDau's Avatar
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    thanks for sharing the node set up! Things like procedural textures of all kinds are always tricky. esp clouds.



  8. #8
    Member Robsorb's Avatar
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    I know right, I even ended up needing to use a sigmoid function to get the result I wanted.



  9. #9
    Member NRK's Avatar
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    You have some nice results. I have several threads asking for people to help with setups like this so I could put them in the generator. I am better at python than I am getting the settings right and things like this help. The whole reason I made the cloud generator was I spent WEEKS working on settings to even get to the point where I did. Unfortunately I gave up after a while and said 'good enough' I've come to the conclusion that blender may never have really good clouds unless they are given some serious love in the code. The problem is that blender has a physically accurate volume system that isn't optimized for clouds. Clouds are HUGE and don't look right unless you bounce light many many many times, in the end you have to 'cheat' by giving them some emission or scaling them down... hopefully Eevee will help.
    We spend years in school to prepare for this life... how much time have we spent preparing for the next?

    My long term Film Project:Glasses the Movie



  10. #10
    Member Robsorb's Avatar
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    Thanks,

    I've mainly been focusing on the textures but I do think I've noticed some of those problems with the shader itself.



  11. #11
    Member vklidu's Avatar
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    Thanks for material Any chance to share blend file?



  12. #12
    Member Robsorb's Avatar
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    No problem, here you go:

    Cloud_demo.blend



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