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HDRI ... IN SPACEEEEEEEEEEEE (Iray)

ScavengerScavenger Posts: 2,674
in New Users

I'm planning on trying some ships in space scenes....is this something HDRI spheres can do? I've seen some space pics, but conceptually aren't sure if they'd provide light for a scene given how much black there's be. Would it be the case of using some fake lighting, or running lights on ships or some such?

Comments

  • FishtalesFishtales Posts: 6,162

    Space isn't dark. If it was we wouldn't see stars as these are light emitting spheres. It will depend on where the scene is in relation to one of these stars how much light it will receive and how much ambient light will depend on the number of other stars ion the area. All of that will depend on the HDR used. You can always put a light source off screen and/or a planet giving reflected light for a light source.

  • Richard HaseltineRichard Haseltine Posts: 102,866

    Space being dark doesn't stop us seeing the stars - that's like saying your phone screen will be invisible in a cellar. The stars do not, however, provide significant levels of illumination. There have been a couple of threads on this topic, I think one of them did have links to some images though i can't recall if they were free or commercial.

  • FishtalesFishtales Posts: 6,162

    What we see is transmitted light when it hits something, depending on where we are standing in relation to the object, then we will either see the object, if we are in front and close enough, or it will stay dark, if we are behind it. Watch the sky on a clear night and occasionally you will see a satellite blink or the space station, as they catch the light from the sun. As to the cellar and the phone. If you were observing the person from behind then they would stay dark but you would still see some light. Walking round the person you would gradually see the light being transmitted back off the person and they would be visible. If there were enough people holding light emitters then there would be enough ambient light to make even the back of the person visible. The same applies in space as long as there are strong enough light emitters within range. We see black because our eyes are sensitive to only a section of the spectrum and if the stars weren't transmitting light in that specific section we wouldn't see them so there is light in space it is just that there isn't anything reflecting it towards us so, in those areas, we see it as being dark but it is just black i.e without colour that we can see and nothing to reflect it back.

  • 3Ddreamer3Ddreamer Posts: 1,318

    Not an HDRI but I had some success with Stardomes converted to Iray and emitter as a backdrop, you'd still need additional light to pinpoint anything the way you would see it in a movie. I was using them outside spacestation and Stonemason's spacedock, so I had a source of light inside.

  • nonesuch00nonesuch00 Posts: 18,333

    You'd treat it as dark nd use artificial light on the spacecraft if that's what you are doing. You've seen how dark it is on a moonless night with no clouds, space is even darker. Any light you'd get would be insignificant if not near a star like the sun so look at pictures of say the space station in orbit around the earth and if they are available the light on a moon or satelite of the Pluto explorer flyby....further out in space even further away from the sources of light the light would be even weaker. And there is no atmospheric blurring to speak of either. 

    This being art though you can make up a lighting scheme as if you were flying through a brightly lit nebula or something.

  • ScavengerScavenger Posts: 2,674

    Well, in my of just leaping, I threw this together.

    It's using the Milky Way HDRI from that free HDRI site that's url is on my other computer but gets listed in any hdri thread here or if you google space hdri you'll see it.

    It does provide a lot of light, but then it's a bit white swath across it (I used the super size jpg, rather than the smaller .hdr which gave me a sharper background.

    Of course, it hurts that I have no idea what the settings mean, but  here it is anyway.

    (I only did a small amount of IRAY conversion on the outfit...it's a freebie at Rendo or Sharecg...and it has SO MANY SURFACES.....like the gun barrels.. EACH ONE has 5 different surfaces..and evety part is it's own object....ieieie.)

    yama.jpg
    1154 x 1500 - 470K
  • ScavengerScavenger Posts: 2,674
    3Ddreamer said:

    Not an HDRI but I had some success with Stardomes converted to Iray and emitter as a backdrop, you'd still need additional light to pinpoint anything the way you would see it in a movie. I was using them outside spacestation and Stonemason's spacedock, so I had a source of light inside.

    Isn't making dome an emitter a "bad thing"? Like super slow rendering?

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