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Afternoon Drive
Afternoon Drive
Comments: 5
rashadcarter1

21.09.2018, 16:31








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Metro
Metro

            

Metro
Description: Dystopia 11-20 Poser City Blocks from DAZ. Rendered in Bryce 6.1, about a 2 hour render. The blur is not DOF, but a custom blur I added in PS with the Blur tool. Lots of brown haze in the original scene, but contrast and saturation adjustments in PS kinda destroyed that. Comments are welcome.
Added by: icecreamman
Keywords: icecreamman, metro, city, haze, photoshop, bryce, 6, ., 1, blur, dystopia, daz, blocks
Date: 07.28.2007 05:10
Hits: 4063
Downloads: 79
Rating: 5.00 (1 Vote(s))
File size: 271.9 KB
Previous image: Metro MKIII
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Author: Comment:
Horo
Admin

Join Date: 05.26.2004
Comments: 4445
Sun in moonbluegrey

It appears that your last post was lost due to the hacking of this site. There was a detailed comment by Rashad and another one by me - in which you asked a question. The inclusion of a bright light source in the bluemoongrey.hdri was discussed.

My comment was based on theory, I tested that and come up here with a more correct procedure.

Since the hdri will not be visible in the background, putting the "sun" in the zenith is the easiest option. You know where it is and can rotate and tilt the hdri (like the bryce sun) to the position you want.

1. Create a black picture twice as wide as high in any graphics ap.

2. Add a bright strip (white or slightly coloured) at the top of this picture taking up the full width. Make it about 1 to 2% as high as the picture.

3. Open this pict in HDRShop and amplify the bright strip: Image > Pixels > Scale, enter for R/B/G 20.0 for each.

4. Open moonbluegrey.hdr in HDRShop and transform from light-probe to latitude/longitude, using the same size as the pict.

5. Then blend both: Calculate > Maximum (not A+B or A*B as I claimed).

6. Transform result from latitude/longitude to light-probe and save it as hdri and there you are.

In the latitude/longitude transformation, the poles of a sphere are stretched at top and bottom. Look at this worldmap http://en.wikipedia.org/wiki/Image:Elevation.jpg and see how Antarctica is a red strip.

Hope this gets you going.
07.28.2007 08:25 Offline Horo h.-r.h.wernli at bluewin.ch https://www.horo.ch/
Nightst4r
Admin

Join Date: 12.11.2003
Comments: 441
Sorry

I'm really sorry guys, we lost exactly 1 week's worth of comments and images. That was how far the last database backup was. On the bright side, the updates to the gallry to prevent the hack he used have given us an RSS feed, as well as a captcha system for new people. With this, every who registers will have to be human :) Robots can't get past captcha systems.. (yet)

Awesome picture =)
07.28.2007 14:54 Offline Nightst4r nightst4r at gmail.com http://www.bryce5.com
rashadcarter1
Admin

Join Date: 06.04.2006
Comments: 2622
-

Who would do that to us? Hack us? Oh well, good thing Nightst4r is the programmer he is. It reminds me to say thanks to you Nightst4r as clearly maintaing a site as friendly as this one still keeps the administrator on his toes and on the defensive. This is a wonderful and open forum and I appreciate the work you put into this site daily! Thanks for getting the problem fixed so quickly.

Yes, this scene is very convincing, but it does not have quite the dramic effect one might expect from icecreamman. I suggested that icecreamman find a way of adding a bright sun to help the scene "pop" a bit. As David discovered and shared wth us many years ago, the default bryce sun is just simply too dim to provide convincing sunlight. So the discussion turned to radial suns vs hdri sun. Then I suggested that you combine hdri with default sun set to soft shadows to maintain the benetifts of the soft shaows of the hdri, since radial lights don't provide soft shadows when the fall-off is set to none as it would be if it were replaing the sun.

Okay, as mentioned there was a long comment by me, and one by Horo that he has reproduced. I will not reproduce mine for it is inferior to Horo's. I will say though that there is a big difference in the way one handles a true hdri and a fake hdri. A true hdri is a single picture made up of many separate versions or shots of the same scene but at different f-stops, or brightness levels. A fake hdr is actually an regular photo but the varying f-stops are faked within a computer program and no layering is actually necessary. The entry I submitted was the easiest way I had found for creating fake hdri's with a bright sun.

Perhaps Horo, you could post on your website a version of bluemoongrey.hdri that is already set-up with the bright spot. It would save time and it would guarantee that it was done right. I think it will come in handy in many many cases.
07.28.2007 15:07 Offline rashadcarter1 rashadcarter1 at aol.com
rashadcarter1
Admin

Join Date: 06.04.2006
Comments: 2622
e-mail

Icecreamman your e-mail address was lost due to the hack. I have the sample scene ready for you so as soon as I have your address I will send it to you. Later.
07.28.2007 15:11 Offline rashadcarter1 rashadcarter1 at aol.com
Horo
Admin

Join Date: 05.26.2004
Comments: 4445
-

First of all: Thank you Nights4r! No great harm's done to "our" site.

Yes Rashad, I'll go about it tomorrow creating and uploading another version of moonbluegrey on my site. I was just busy upgrading my private Wiki and my private 4images so I run the same version as we have here.

No Rashad, your (lost) suggestions are not inferior to mine, just different. There's more than one way that leads to Rome, as we say.
07.28.2007 18:23 Offline Horo h.-r.h.wernli at bluewin.ch https://www.horo.ch/
davidbrinnen
Admin

Join Date: 01.03.2004
Comments: 2227
-

Yes, many thanks to Nighst4r!

I feel the loss of the comments more than many perhaps because I have a rubbish memory (at least over the short term) and so have little concept of what I've written - oh well.

While modifying the hdr is one approach it is rather advanced. An easier solution would be to create a small ring of lights (these describe the perimiter of the fake sun) set the lights to 1 and make sure there is no falloff - use slightly yellow coloured lights. Set this halo some goodly distance from the scene and adjust the size of the halo to control the illusion of soft shadows. Use this alongside the hdr lighting, the overhead is not as bad as using a genuine soft shadow effect but not quite as efficent as doctoring the hdr - but in it's favour - considerably easier to do.
07.28.2007 18:39 Offline davidbrinnen mail at davidbrinnen.co.uk http://www.davidbrinnen.com
icecreamman
Member

Join Date: 05.18.2007
Comments: 130
-

Ok guys, just got back from Kansas City, busy updating on all your comments. First of all, thanks to Nightst4r for reupoloading my image, and staying on top of the site. Great job. Again, email is "jtemple032@cox.net". I tried it and think I achieved the results expected, but the question is, do I uncheck "Disable Sun Light" or not?
07.30.2007 03:34 Offline icecreamman jtemple032 at yahoo.com
rashadcarter1
Admin

Join Date: 06.04.2006
Comments: 2622
-

Whether or not to disable sunlight is up to you. It all comes down to the proprtion of the direct sunlight vs the indirect sky light. The new hdri you created with the bright spot should give you a bright sun now, but it may not yet be bright enough compared to the indirect light. My advice, set the hdri levels to adjust for the indirect light you need first of all. After that you may find that the direct sunlight might still come in a bit dim, so then you would add the default bryce sun to that for added direct sunlight intensity.

Intense sunlight is very important for realism. Many fail to notice the weakness of the bryce sun because they use the ambient channel to provide the missing light, a big mistake for realism sake. Most of the time back when I used only the bryce sun I found that I always cranked up material diffussion levels to 100% and ambient levels to about 19%. This is not good, in that now I have no place more to go with diffussion, as in my options for brigthness were extremely limited. But with a brighter sun, I can control the diffussion levels alot more. Now with more intense lights I usually don't raise diffussion values above 80%. The added light has a huge impact on specularity and reflection, and that is where the added light makes a world of difference.
07.30.2007 12:04 Offline rashadcarter1 rashadcarter1 at aol.com
icecreamman
Member

Join Date: 05.18.2007
Comments: 130
-

Ok thanks, that helps me a lot.
07.30.2007 14:18 Offline icecreamman jtemple032 at yahoo.com
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