Cog's Quick Tutorials Cloud Creation in Blender

Hi all,

A very happy New Year to you all.

http://www.cogfilms.com/tutorials/clouds/wide-sky-06.png

As promised I have uploaded my latest Cog’s Quick Tutorials No.5 Cloud Creation in Blender. As with all of my quick tutorials this is available from my webpage:-

www.cogfilms.com

Enjoy.

Cog

I always love your tutorials. I learn so much from them! :smiley:

Me too. I still have your PDFs on water and wav effects. And your site rocks!

Thank you…

You rock too, Dreamsgate

Hi Cog,

Thanks for the tutorial, it looks useful. :smiley:

One thing I noticed though. In your .blend example you have a lamp set as Negative. I did 2 test renders, one with that lamp active and one without the lamp. Both renders look identical. So I am wondering what is the Negative lamp for if it has no effect on the scene?

Excellent tut.

With your setting you can get nice clouds with reasonable render times.

However, I don’t suppose they are actually volumetric - you couldn’t do an animation of flying through fields of those clouds could you?

Koba

They are!

I recently had to do a spaceship flying through a nebula and that’s how I did it!

Hey Cog - did you know that now with 2.4’s show unborn and died feature in particles that we don’t need the timing IPOs to animate clouds this way direct in Blender any more!

This could not have come at a better time. I need to render some clouds for a big screen project using chinese flying dragons. I have used your technique to achieve stunning results in my comps.

I pass on many thanks. :smiley:

I recently had to do a spaceship flying through a nebula and that’s how I did it!

Wow, if you could show me an animation of flying through clouds from a bird’s eye view I would be seriously impressed.

I tried a similar technique earlier this week (before Cog’s tutorial) using way more particles then needed are it took ages to render. When I tried rotating around my cloud, it vanished into nothing - something to do with normals or particles facing away from the camera (or something).

I suppose if shape keys were used on the emitor mesh you could have ever shifting forms too. Show me a flyby through rolling clouds and I will be doubly impressed!

If you decide to give this a go, you could just set up the scene and post a .blend - I can render it if you want.

Koba

Hi roofoo,

Although that light is set as negative you will also notice its set with No Diffuse and No Specular. That has effectively turned the lamp out. In that example blend file I had been experimenting with a negative lamp, which is a good way of darkening parts of a cloud. However, I should have moved it to another layer or deleted it for the example.

Cog

Hi koba,

Yes you can. Take a look at my nebula examples from my October 2004, and January 2005, entries on my website:-

http://www.cogfilms.com/nebula-concept2.html
or directly :- http://www.cogfilms.com/movies/nebula4-320x180.mov
http://www.cogfilms.com/nebula-concept6.html
or directly :- http://www.cogfilms.com/movies/nebula-6b.mov
http://www.cogfilms.com/twinkle-star-small.html
or directly :- http://www.cogfilms.com/movies/twinkle-star-small.mov

and also a cloud flythough developed at the same time:-

http://www.cogfilms.com/cloud-concept1.html
or directly :- http://www.cogfilms.com/movies/cloud1.mov

Cog

Hi roofoo,

Although that light is set as negative you will also notice its set with No Diffuse and No Specular. That has effectively turned the lamp out. In that example blend file I had been experimenting with a negative lamp, which is a good way of darkening parts of a cloud. However, I should have moved it to another layer or deleted it for the example.

Cog[/quote]

Ok, thanks!

Wow, thanks cog.

The cloud flythrough you demonstrate is exactly what I mean. I had seen the nebula before as I have browsed everything on your site (it is absolutely excellent!). The cloud flyby is exactly what I meant but not quite as impressive as I had imagined - perhaps because the clouds are rather thin. I was thinking about clouds as dense and fluffy as the ones you create in your tutorial!

However, you have demonstrated a proof of concept - I’m gonna have a go at a flyby with denser clouds now (the rendering time will be forever).

Koba

Wow, this technique is great!

I just took cog’s .blend, used a time IPO to freeze the particle systems and did some crude keyframing. The results are impressive, have a look!:

Flying through clouds

I’ve hear people complain about Blender not having volumetric particles. The results here are very good and the rendertimes seems reasonable. However, having not used volumetric particles/hypervoxels or whatever they are now called, I have no real comparison.

Koba

Koba, what codec did you use for that .avi? I can’t get it to play.

me as well and i even use vlc which hardly plays nothing.

I had a problem with the codec - DivX wouldn’t work. After another attempt I think all should be fine (will be fine). Please have another go (and the file is much smaller now too). I was trying to use one of the default codec on my system earlier (the Indeo codec I think).

Flying through clouds again

Koba

Hi Koba,

Great animation. Glad you liked the tutorial.

Cog

Correct me if I’m wrong but halos don’t cast shadows, they do receive shadows from solid objects but not from each other. That’s what makes it hard to get clouds or nebulae that look lit correctly. I hope with the nodes being worked on particles and halos will get a little TLC in the process. Anyway nice tut, I was just working on my own cloud method to fake self-shadowing, have to compare what you’ve got to what I’m doing.