Digital Art Zone

 
   
1 of 3
1
First HDR Attempt.
Posted: 16 February 2013 06:28 PM   [ Ignore ]
Member
Rank
Total Posts:  98
Joined  2005-01-24

In another thread, David Brinnen suggested I try doing some HDR with one of my Images and here are the results.

First image is the Original Render.
Second image is the HDR version with “Sunny Beverly HIlls.hdr”
Third image is the settings used.

In the HDR version the metallic pitted ground now looks like its water.

Image Attachments
Abstract9.jpgAbstract9hdri.jpgIBL_Settings.jpg
 Signature 

My Audio Production: http://soundcloud.com/analog-x64

Profile
 
 
Posted: 17 February 2013 01:14 AM   [ Ignore ]   [ # 1 ]
Power Member
Avatar
RankRankRank
Total Posts:  1500
Joined  2011-09-25

The outer shell has a more metallic, polished, look using the HDRI.  Personally, I like that look better, along with the now looking water.

 Signature 

If you constantly look backward, it’s guaranteed you’ll run into something on your forward journey.
My Gallery Page: GussNemo’s Efforts

Profile
 
 
Posted: 17 February 2013 02:06 AM   [ Ignore ]   [ # 2 ]
Addict
Avatar
RankRankRankRank
Total Posts:  3566
Joined  2004-10-01
Analog-X64 - 16 February 2013 06:28 PM

In the HDR version the metallic pitted ground now looks like its water.

Looking good. Turn down Saturation. There’s a lot of blue coming from the sky, hence the water-like appearance.

 

 Signature 

**  [ Stuff by David Brinnen and myself**  [ My DAZ 3D Gallery**  [ My Website**  OPC 4565 **

Profile
 
 
Posted: 17 February 2013 02:55 AM   [ Ignore ]   [ # 3 ]
Power Member
Avatar
RankRankRank
Total Posts:  1623
Joined  2007-12-10

I’d also be tempted to turn the sun back on (when you load an HDR it automatically turns the sun off), that way you’ll get your nice shadow and light shining through the red glass back like on your original. You may then need to mess a bit with the intensity and HDRI effect controls.

The HDR reflection certainly adds something though and looks great.

 Signature 

I’ve got nothing of my own to promote, no models, no tutorials, no website, nothin’, nada, nill, nowt.

Profile
 
 
Posted: 17 February 2013 07:45 AM   [ Ignore ]   [ # 4 ]
Member
Rank
Total Posts:  98
Joined  2005-01-24

As per suggestions, I turned the sun back on and played with the HDR settings in IBL.

Metallic ground does not look like water, but the image looks washed out.

Image Attachments
Abstract9hdriv2.jpgIBL_Settings.jpg
 Signature 

My Audio Production: http://soundcloud.com/analog-x64

Profile
 
 
Posted: 17 February 2013 08:30 AM   [ Ignore ]   [ # 5 ]
Addict
Avatar
RankRankRankRank
Total Posts:  2612
Joined  2004-07-06

Yes it is a bit of a balancing act getting the light balance correct and knowing what setting to use when you introduce a HDRI to an already composed scene, but don’t be discouraged, you will soon get the hang of it.

If render time is a concern, remember to set the quality down to 16.  Your HDRI is outputting no effect, which is fine and as a result you could turn shadow casting off in IBL and be sure to set the specular output to 0 too!

Another thing to try, if you haven’t (and to know exactly what is going on I’d need to look at the source) but do turn your Atmosphere off and set it to fully black.  Then use “add to sky” option in the IBL tab.  That will eliminate some of the causes of washing out potentially.  Then consider modifying the diffuse and specular output of your main light source - which is now only complimented with the reflections of the HDRI image and no other light input.

Key settings to be aware of that could cause washing out.

Sun/moon shadows not being set to 100%
Ambient response in materials (set global ambience to RGB 0,0,0)
Skydome colour light pollution (set skydome colour to RGB 0,0,0)

Just a few suggestions there.

 Signature 

that Bryce Tutorials Info and this Products made by Horo and myself and a link to my gallery at DAZ 3D

Profile
 
 
Posted: 17 February 2013 05:34 PM   [ Ignore ]   [ # 6 ]
Member
Rank
Total Posts:  98
Joined  2005-01-24

Thanks for all the feed back and advice, its is appreciated and I’m actually having fun.

Render speed is not a big concern, I have a previous generation Quad core CPU (Intel Core 2 Quad Q8400 @2.50GHz)

This particular scene took 6 minutes 14 seconds to render, which all cores at 100% when Bryce is rendering.  The original scene did already have all Atmospherics turned.  I’m going to post all of the sky settings as well the current iteration of the scene.

I wanted to see what “Link to sun view” would do, and it has changed the direction which shadow is falling.

Image Attachments
Abstract9hdrv3i.jpgSkylab1.jpgSkylab2.jpgSkylab3.jpgSkylab4.jpg
 Signature 

My Audio Production: http://soundcloud.com/analog-x64

Profile
 
 
Posted: 17 February 2013 06:17 PM   [ Ignore ]   [ # 7 ]
Addict
Avatar
RankRankRankRank
Total Posts:  2612
Joined  2004-07-06

Here then visually,

Image Attachments
Image1.jpgImage2.jpg
 Signature 

that Bryce Tutorials Info and this Products made by Horo and myself and a link to my gallery at DAZ 3D

Profile
 
 
Posted: 17 February 2013 08:55 PM   [ Ignore ]   [ # 8 ]
Member
Rank
Total Posts:  98
Joined  2005-01-24

Thanks for the visuals David, I misunderstood the RGB 0,0,0 to actual controls that would allow me to set values by typing them in smile

So once I got the correct Sun/Atmosphere settings, the image became dark again so I increased the “Intensity” setting in IBL to 24 and here is the latest results, oh and I increased the Ray Depth from 6 to 12 in the render settings.

Image Attachments
Abstract9hdrv4.jpg
 Signature 

My Audio Production: http://soundcloud.com/analog-x64

Profile
 
 
Posted: 17 February 2013 09:48 PM   [ Ignore ]   [ # 9 ]
Power Member
Avatar
RankRankRank
Total Posts:  1623
Joined  2007-12-10

That’s looking great now.

Next experiment with soft shadows. Once you’re in Premium Render settings the extra time for soft shadows isn’t much.

In the sky lab, set the sun’s Shadow Softness option to about 20 or 30, then in the render settings make sure that Soft Shadows is switched on.
It’s all that’s needed now for a finishing touch.

 Signature 

I’ve got nothing of my own to promote, no models, no tutorials, no website, nothin’, nada, nill, nowt.

Profile
 
 
Posted: 17 February 2013 11:03 PM   [ Ignore ]   [ # 10 ]
Member
Rank
Total Posts:  98
Joined  2005-01-24

@TheSavage64 I’m rendering with soft shadows next.  The first test resulted in a very noisy image, so I changed the render settings with a higher Ray Depth.  So now the render is going to take hours instead of minutes.  Will see how it looks tomorrow morning.

 Signature 

My Audio Production: http://soundcloud.com/analog-x64

Profile
 
 
Posted: 17 February 2013 11:54 PM   [ Ignore ]   [ # 11 ]
Member
Rank
Total Posts:  98
Joined  2005-01-24

Soft shadows at 30
and Rays per pixel bumped up to 64 to get rid of the noise.

This one took 1 hour and 6 minutes.

Image Attachments
Abstract9hdrv5.jpg
 Signature 

My Audio Production: http://soundcloud.com/analog-x64

Profile
 
 
Posted: 18 February 2013 12:29 AM   [ Ignore ]   [ # 12 ]
Power Member
Avatar
RankRankRank
Total Posts:  1623
Joined  2007-12-10

You can usually shave some time off renders by reducing the Maximum Ray Depth (in your render options).
It’s default is 6 but most scenes can get away with reducing that to 4 or even 3.

Edited to Add: I just realised you said you’d set your Max Ray Depth to 12…. That’ll be why your render time is so long.

The soft shadows is subtle but it does look more natural now. smile

 Signature 

I’ve got nothing of my own to promote, no models, no tutorials, no website, nothin’, nada, nill, nowt.

Profile
 
 
Posted: 18 February 2013 02:24 AM   [ Ignore ]   [ # 13 ]
Addict
Avatar
RankRankRankRank
Total Posts:  3566
Joined  2004-10-01

@Analog-X64 - you can also use the HDRI to light the scene. The HDRI you use has a bright light source (the sun), then you don’t need to use the Bryce sun. This would then be called rendering with natural light (RNL). IB light brings bump out nicely. Rendering with soft shadows is a bit of a render hog. If you use soft shadows from IBL, turn the quality down. Your last example uses only the backdrop but no IB light. Another thing to experiment with…

 Signature 

**  [ Stuff by David Brinnen and myself**  [ My DAZ 3D Gallery**  [ My Website**  OPC 4565 **

Profile
 
 
Posted: 18 February 2013 03:04 AM   [ Ignore ]   [ # 14 ]
Addict
Avatar
RankRankRankRank
Total Posts:  2612
Joined  2004-07-06
Analog-X64 - 17 February 2013 08:55 PM

Thanks for the visuals David, I misunderstood the RGB 0,0,0 to actual controls that would allow me to set values by typing them in smile

So once I got the correct Sun/Atmosphere settings, the image became dark again so I increased the “Intensity” setting in IBL to 24 and here is the latest results, oh and I increased the Ray Depth from 6 to 12 in the render settings.

If you hold the alt key down while clicking on the colour swatch (any in Bryce) then you can bring up a little dialogue that allows you to ender RGB values, or HLS or another one I can never remember and don’t use.

If you want to use soft shadows it is usually better to go for premium render mode, check soft shadows and also treat yourself to a bit of DOF while you are at it.  I’ve provided tutorials to cover that option.  The reason being that the render engine for premium rendering is different from the first three in the Render Options and will handle these things a little more effectively.  64 RPP is usually enough to achieve this effect.

As for Ray Depth, it is rare to have any need to go over 6.  I usually drop mine to 4 for most renders, unless I see a Ray Depth issue in the render, and then I lift it until it goes away.  A ray depth issue would be a situation where light fails to make it through several over layered transparent materials or can’t tunnel far enough down into a reflection to disguise the underlying blackness that haunts Bryce once the ray depth has been used up.

 Signature 

that Bryce Tutorials Info and this Products made by Horo and myself and a link to my gallery at DAZ 3D

Profile
 
 
Posted: 18 February 2013 11:38 AM   [ Ignore ]   [ # 15 ]
Member
Rank
Total Posts:  98
Joined  2005-01-24

@Horo If I turn off the sun, I lose the shadows and enabling “Cast Shadows” in IBL does not help either.  I still have a lot to learn smile

@David I’m re-rending the image at a higher resolution with a lower ray depth will see how long it takes.

 Signature 

My Audio Production: http://soundcloud.com/analog-x64

Profile
 
 
   
1 of 3
1