Outer Space HDRI for Iray Renders?

alexhcowley

I have an idea for a series of  renders set on an orbiting spacecraft using this set:

https://www.daz3d.com/the-captain-s-ready-room

Does anyone have any suggestions for an appropriate HDRI that I can use as the background?  I vaguely remember seeing such a product recently but I've been unable to track it down.

Cheers,

Alex.

WendyLuvsCatz

http://www.hdrlabs.com/sibl/archive.html has a Milkyway HDR

Xenomorphine

JaguarElla said:

http://www.hdrlabs.com/sibl/archive.html has a Milkyway HDR

I remember trying that in Reality, but ended up looking very low-resolution.

Iray needs something like Digivault's Stardomes, which was really fantastic for 3Delight, but sadly won't function when doing any Iray renders.

Space, stormy weather and alien coloured skies, are the atmospheric effects Iray is still in need of. I was genuinely surprised it took as long as it has for someone to do night skies for it!

Horo

If you have Bryce, you can convert the angular maps into the spherical projection using these products (I apologise for what seems to be advertising) http://www.daz3d.com/bryce-7-pro-deep-space-hdri-1 and/or http://www.daz3d.com/bryce-7-pro-deep-space-hdri-2 I have only recently started to provide HDRIs for Daz Studio/Iray.

 

WendyLuvsCatz

I have a huge jpg of the Milkyway by NASA I use as 360 backgrounds but it is not a HDR

Horo

I did converted that one to a true (faked) HDRI, took me less than a day and used it here http://www.daz3d.com/gallery/#images/93738

 

Oso3D

I've submitted a procedural shader pack that, among other things, has a 'stars' preset.

In the meantime, I've had good results just making star maps with noise:

In GIMP2, new document, fill with black.

Filters > Noise > RGB Noise, max out the sliders.

Desaturate - Luminosity (or adjust HSV if you still want a touch of the color -- if you leave some color and then use a high brightness on the result, you might get a pretty nice result)

Make sure to be at 100% scale

Levels, slide the leftmost arrow of the Input slider almost all the way to the right, until you get a result you like.

 

You can then make a rather large image, like 8k x 4k, for an environmental image. It's not HDR, but it should look pretty good.

You could also use a smaller map and tile on a sphere.

 

alexhcowley

JaguarElla said:

I have a huge jpg of the Milkyway by NASA I use as 360 backgrounds but it is not a HDR

Thanks for your help. Can you point me in its direction?

Cheers,

Alex.

WendyLuvsCatz

It might be the one here

http://www.spitzer.caltech.edu/images/3341-ssc2008-11a2-GLIMPSE-MIPSGAL-Milky-Way-2 

I see theres a tiff too the one I have is this I think but I am pretty sure I grabbed it off Blue Marble not there 

 

http://www.spitzer.caltech.edu/uploaded_files/images/0006/2669/ssc2008-11a2.jpg

Fishtales

I've used the Milkyway HDRI in a few renders. Changing the dome radius and dome range multiplier helps.

Horo

If you're happy with a LDRI to use as backdrop on a sphere, here's a 24-bit TIFF image http://www.eso.org/public/images/eso0932a/ up to 6000 x 3000 px.

 

WendyLuvsCatz

I have a 3D model of the Milkyway I have rendered in iray as well as Octane using an emission texture

http://www.daz3d.com/forums/discussion/28775/vrml-wrl-nasa-milkyway-model#latest

if you prefer that route, better for animation

still needs dark matter in middle, have the dust model prob negative emission

Oso3D

Here's an example of stars generated as I described. (I got a little fancy by layering a little bit of colored noise, but it's not necessary)

No postwork.

Horo

And then, there is always Universe Image Creator http://www.diardsoftware.com/ not free, but neither expensive.

 

alexhcowley

I've downloaded the jpegs suggested by Jaguar Ella and Horo and run a test which has produced a pure white backdrop.  I specified type backdrop on the environment tab and added the image to the environment map option on the render settings tab.  I must have one of the other settings wrong, does anyone have any ideas?

Cheers,

Alex.

WendyLuvsCatz

Dome and show dome both checked?

Szark

white is from the Environment Pane > Backdrop - turn if OFF and turn on Draw Dome in the render settings pane as Jaguar suggested above.

alexhcowley

Szark said:

white is from the Environment Pane > Backdrop - turn if OFF and turn on Draw Dome in the render settings pane as Jaguar suggested above.

Thanks, Pete. I am now getting an image on my renders but it's an orange blur. I think I have some kind of scaling problem since I'm using a 6000 x 3000 pixel jpeg. I've tried fidlling around with the dome raidius and the dome scale multiplier with no  apparent difference. I'ave also tried it with both a finite and infinite dome. 

I have attached a couple of screen shots which show the HDRI and the resultant render.  Any further help you can offer would be greatly appreciated.

Cheers,

Alex.

Fishtales

I used the full size .tiff in this image plugged into the Environmental Map in the Iray Dome set to 0.50; Resolution at 4096; Dome Scale Multiplier at 1.0; Dome Radius at 6000; Dome Rotation 162.92. Added a Distant LightLuminous Flux at 1.00; Temperature at 7500 for light on the ship.Tone Mapping settings are at default.

Click on image for full size

alexhcowley

Fishtales said:

I used the full size .tiff in this image plugged into the Environmental Map in the Iray Dome set to 0.50; Resolution at 4096; Dome Scale Multiplier at 1.0; Dome Radius at 6000; Dome Rotation 162.92. Added a Distant LightLuminous Flux at 1.00; Temperature at 7500 for light on the ship.Tone Mapping settings are at default.

Click on image for full size

Many thanks. I'll try this  first thing tomorrow morning.

Cheers,

Alex.

Chatjd

Or maybe the OOT HDR 360 Environment for Iray would work?  http://www.daz3d.com/oot-hdr-360-environments-space-for-daz-studio-iray

 

alexhcowley

Chatjd said:

Or maybe the OOT HDR 360 Environment for Iray would work?  http://www.daz3d.com/oot-hdr-360-environments-space-for-daz-studio-iray

 

Thanks, this is the product I refered to in my original post  but couldn't find.  I will try using this.

Cheers,

Alex.