Janjy, the artifacts are caused by light cache, either increase the resolution of disable it. Both of these have serious drawbacks to render times. This is inherent in blender right now, someday to be fixed I’m sure, but for now I either ignore them or disable it. I disabled light cache once and it took 3 MONTHS to render my flythough: (dual core)
Particle systems are MASSIVELY buggy right now. That is one of the major reasons I disabled them by default in the script and convert clouds to a mesh. I really wanted to apply a cloud texture in python to the particles before I converted it to a mesh (that’s why the cloud generator has the cloud texture and the cloud force field in it although right now they aren’t used), but I couldn’t find a way to reliably advance the timeline in python and have the particles at the correct location. You can’t do it manually, try it in python:)
The devs know this, that’s why they’re working on this:
RIcky, the correct way to scale a cloud is degenerate it, scale it and gen cloud again. The script does a lot of calculation of the correct point density size etc that is very size dependent, so scaling a cloud is strictly at your own risk unless you adjust point density radius accordingly and apply scale and rotation to the cloud after scaling (cntrl-a).
I was thinking about including the tornado in the script, but it really isn’t a cloud so I didn’t want to make the script too confusing.
i think the tornado goes very well with clouds
it’s a sort of monster cloud vortex and would not require another script just for that!
and it’s already using the clouds generator so it can be integrated i think!
the Cloud size
but how do you work witht it if you already have a scene with let say a plane or jet
size to real dimensions and try to add some clouds
i mean do you have to re scale all your models objects back to fit with the size of the clouds generated with your script ?
i tough it would have been easier to do the opposite scale the clouds to fit the scene!
OK, here’s my very short fly-through. I painted out the artefacts and it’s not too noticeable now. Just a bit of flickering. Overall, I’m quite happy with it. The cloud script is lovely!
Ricky,
Yes, scale the clouds to the scene, but as geemotry not volumes, but before you generate them. Unfortunately the way volumes were integrated in to blender doesn’t lead to easy scaling once you create the clouds, don’t know what to tell you beyond that.
it show the shadows on the floor function of the stainglass color
i did not use transp here only ztransp
hope it does nto matter !
now i redid this in 2.5 but adding a fog box on the scene reduce the density around 0.1
and had to add some red color for reflection to volume to begin to see any color in fog
so the questions here is
is there a way to get color from the stainglass to influence the fog color from a white spot light ?
last pic show the color red from reflection in volume
but not the wanted effect !
last pic show the wanted effect
one white spotlight which will take the colors of stainglass and produce fog with different colors!
Love the Ice Ricky, but I think it might look better if you turned up the scattering to give them more shodows. I know Farsthary did some pretty cool ice with volumes a while back on his blog, anyway looking good.
As for the shadowing I downloaded the file and played with it a while and your answer is… I don’t know. You are asking a Matt Ebb question, I know you could do it with several different spot lights, but to do what you want has to do with Blender’s internal math and unfortunately I’m not familiar with all of the different permutations of zbuffers/ray trace/multiple scattering etc… sorry, I really don’t know.
the image your after doesn’t look like a volume at all, just a material with alpha to it mapped to the surface. If you want to do it with a volume just use my first tutorial, you don’t even need nodes though, just apply a texture to the density like the tut, but under the colors tab turn the contrast way up. If you want you can steal the material from the light texture I posted a while back.
Does anyone know what kind of settings I could use for volumetrics to get nice looking textured surfaces like rock? I saw Farsthary made a cool doorway from textured volumetrics but I cant get the same sort of surfaces from mine. i.e. with reflection and spec etc.
I have got Integration step size right down and linear rather than random (gets rid of that noisy edge).
Well I manged to pinch some ideas from the trees (I forgot about that project), and got a quite solid look…
…BUT.
I have found that the surface of my volumetric is patchy (no cloud texture present) and I cant eliminate it. All I want is a regular surface.
And
You cant apply a volumetric to a curve object like text. I imagine that is because the extrude is a downstream function so the object doesn’t have a real volume to calculate.
Whenever the shadows are messed up or are blotchy TURN OFF LIGHT CACHE or increase it’s resolution.
I am bolding this so people going through this blog don’t skip over it. This is a recurring theme for volumes and I did try this and it fixes your problem. As for curves I don’t know why they wouldn’t work but it looks like you’ll have to alt-c them into a mesh and then render them.
