#59: SHADOWS & LIGHT (Vue)
#58: ADVANCED DIRT MAPPING (Vue)
#57: SSS IN VUE 9, AND THE "SPECKLE" PROBLEM
#56: THE DEVIL IS IN THE DETAIL OF ART
#55: FIXING POSER CLOTHING
#54: MAKING "FOREST WAR - GOBLIN SHAMAN"
#53: MAKING A STUDIO RENDER FOR VUE
(and other apps)
#49: NEBULA MKIII (Vue)
#48: RENDER SETTINGS FOR VUE (Vue)
#47: POSTWORK - MAKING A RENDER INTENSE (Any)
#46: MAKING RIVERS THAT FOLLOW TERRAIN HEIGHTS (Vue or Bryce)

YET ANOTHER NEBULA TUTORIAL FOR VUE! ;)
AND MAKING GALAXIES!

  I love space scenes, always trying to get better space effects....so, here's yet more work and tips on a major part of space scenes: nebulas ;)

NEBULA USING VOLUME SHADED MATERIAL, WITH 2 POINT LIGHTS WITH CUSTOM LENS FLARES
NEBULA USING VOLUME SHADED MATERIAL, WITH 2 POINT LIGHTS WITH CUSTOM LENS FLARES

VARIOUS NEBULAE USING VOLUMETRIC SHADED MATERIAL,
note these nebulae terrain objects are small and very close to the camera

 

SAME NEBULAE MADE LARGE, FAR AWAY, AND HAVE HAD THEIR MATERIAL SCALED UP & TWEAKED

How I did this was to use a Volumetric SHADED material on terrains that have been made Symetrical, it has to be Volumetric shaded, because normal volumetric materials cannot have multiple colours...real nebulaes have many hues.

Making a terrain a symetrical object gives it ability to use volumetric materials better, as it's a "solid" object. Note, that by scaling the terrain you affect how the material looks!! Thicker the terrain gets, more material opacity it has.

Another important point: if you clip or "paint" edit the terrains in Terrain Editor, some bug makes the material invisible. No idea why, but it's very annoying! You cna easily fix that by addign a little "USE DISTANCE FIELD"
There is also a bug at the moment in the material editor that makes the materials not visible, at times, see below

Alternatively, you can use greyscale images, to drive it all, of course.

TERRAINS SCALED VERY LARGE, MOVED FAR BACK, MATERIAL TWEAKED BY REDUCING OVER ALL DENSITY VERY LOW. NOTE THE "BAD" NEBULA ON TOP, IT HAS NOT HAD DENSITY REDUCED, OR THE EDGES OF THE TERRAIN CLIPPED.
VIEW OF HOW THE TEST SCENE WAS BUILT, SHOWING SYMETRICAL TERRAINS

Connect the FUZZINES function to a fractal, now, you can do this many ways, I used a Variable Roughness Fractal. Experiment for taste, there's no"right" or "wrong" way, you just wish to get what looks good to you ;)
Note, adjust the QUALITY BOOST to taste, it has major impact on whether the nebula is rough, or soft and puffy.

Also, nebula glow brilliantly, so in Lighting, add Luminous to whatever amount desired. Add random function to that too if wish, for more realism.


Next, you need to make sure the fractal is not too opaque, so I used a BLENDER to combine the fractal, with white, the end output is lighter grey, this means most of the nebula will be transparent, which is what we want. Nebulae are gaseous, not solid.


Colour production is up to you, here I used a Voronoi.
Note you can see one of the bugs in action here, note the dozens of function links flying off to one side!


Now, nebulae are VERY big and VERY far away. So, often, you want to move the terrains way far back and scaled up, this requires tweaking, Increase material scale up to perhaps 1000! Decrease over all density WAY down, to say 0.01

So, it will take a bit of tweaking to get right for your scene, as the scale, size of objects etc all have huge effect :)

BUGS:
At the moment, there's a bad bug in the material editor, AND one soem how linked to the terrain editor, that make stop the object being visible.
1) Adjust the Distance Field in material edtitor, this slows renders down, by the way.
2) delete and remake both the blender and solid colour node, if #1 doesn't work.

a) If you clip or paint brush edit the terrain, the material can disappear.
This same tehnique can be used to make galaxies! You can sculpt a terrain, or use a greyscale image , to achieve the look of a a galaxy
SIMPLE VOLUMETRIC SHADED GALAXY
My sincere thanks to "RedTrek" from Renderosity.com, who figured out that using "Use Distance Field" sorted the bug, and about using this to make galaxies! :)

I hope you find this of use! :)
Silverblade the Enchanter, © 2008

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All original art, writing on this site, copyright of Steven James, "Silverblade the Enchanter" ©2012