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Comments: 6
rashadcarter1

19.04.2024, 04:47

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Screeslope

Screeslope
Description:	Lit throughout with Horo moon-bluegrey.hdr. The best ambient lighting hdr available for Bryce. In addition there is a radial light acting as standin for the sun. This scene is actually thee scenes in one. Initially I intended to use DOF to get to effect I wanted. However, the render time proved prohibitive. So after experimenting with object masking and distance masking and other such awkward filtering effects, I settled on compositing the images together in bryce. Scene 1, the photo sky and snow covered mountains. Rendered, then blurred and soft focussed, in PSP8. Scene 2, with scene1 as a backdrop and everything in it except the daisies. Rendered and then softened in PSP8 with a softening "brush" - this allowed me to leave the very foreground unaffected by the softening. Scene 3, just the flowers and the background. The flowers (Lisa's Botnaical Daisies) I had to modify the stalk and leaves to be very dark. This meant that the light from the hdr arriving from underneath (there being no ground - the ground is just a backdrop image which does not cast any shadows) could light the inside of the petals, giving them a translucent appearnance. Finally, some lenzflair added in the top left to offset the weight of the dark cliff. Altogher, very fiddly. But turned out well if you like that sort of thing.
Added by:	davidbrinnen
Keywords:	davidbrinnen, bryce6.1, IBL, hdr, moon-bluegrey.hdr, Horo, daisies, DAZ, scree
Date:	07.01.2007 15:19
Hits:	3895
Downloads:	97
Rating:	5.00 (6 Vote(s))
File size:	206.7 KB

Previous image: Battle for Nerakh-Taar

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GWYDION16
Member

Join Date: 04.06.2004
Comments: 99

very cool

very cool david i love thie sen but the only wuestion if how did you make the terrain iibn the left of the pic that is fantastic 5/5 of cousre

07.01.2007 16:06

davidbrinnen
Admin

Join Date: 01.03.2004
Comments: 2224

The terrain on the left of the daisies? From a blank terrain, used basic noise, sharpening and sub plateus. Then lowered and painted in the shape of the land. Finally turned the terrain on it's side about 45 degrees and squashed it vertically, then turned it again, and squashed it and so on till it was diamond shaped.

07.01.2007 17:16

rashadcarter1
Admin

Join Date: 06.04.2006
Comments: 2610

It turned out very well. Excellent. Looks real for sure. I just wonder where in the world one would find daisies so close to snow covered mountains. The image is stunning and very beautiful!! 5/5 for you!

07.01.2007 17:49

Horo
Admin

Join Date: 05.26.2004
Comments: 4721

This is an interesting technique you used to create this picture. The total time to render the backdrop, blur it, import it back into Bryce as billboard, render it again with the mid- and foreground, blur that render too and import it back into Bryce as billboard, add the vegetation and render yet another time must be shorter than rendering the whole composition with DOF at 32 or 64 rays, otherwise this fiddling is futive. I'm sure you've tested that.

As for the flowers: Rashad is quite right but I have not discovered that Lisa's Botanicals from DAZ sport the white Edelweiss (leontopodium alpinum), the red, slightly violett alpine rose (rhododendron hirsutum) or the deep blue gentian (gentiana alpina); those would be the only flowers (particularly the first one, which is the flower of my country, usually red because you plunge from the places you find them and arrive as quite a mess several 1000 ft lower after a fast but uncontrolled fall - in the aviation jargon: uncontrolled flight into terrain) you would find at such a place.

Nevertheless, for technique, ingenuity and result five out of five.

07.01.2007 19:50

davidbrinnen
Admin

Join Date: 01.03.2004
Comments: 2224

Thanks. Aye, I ain't no botanist that's for sure. I know it's a flower because it isn't green on top. That's about as far as my floural knowledge goes.

As for the render time. I know very exactly that this technique was faster because I began rendering the same scene with DOF in the 36 rpp shortly after I concieved this technique. In the mean time I implimented my theory and finsihed it, did it again, slightly differently, then finally came up with this hybrid version for my final scene with the DOF render looking like it was going to take the best part of a week to finish. Of course if it were not for the IBL I'd say use DOF at 64 and avoid the fiddling... but the IBL makes a great impact on render times with DOF.

07.01.2007 20:20

icecreamman
Member

Join Date: 05.18.2007
Comments: 130

Not bad.... I would love to know how to composite images into bryce... Especially skies! I have a larger version of "Majesty" rendering right now... 1024x768 at double the quality/speed. Started it at 7:00 this morning and it's still going, now 3:30 this afternoon. I don't anticipate it being done until tommorow. Point being, how do you substitue images into bryce for skies/backdrops? Thanks.

07.01.2007 20:39

davidbrinnen
Admin

Join Date: 01.03.2004
Comments: 2224

There is no easy answer to that question because there are so many variables within a scene you need to plan ahead. Think about your overall lighting scene, be aware of where your light is comming from. The nuts and bolts. Well, take your render, process it in the paint package of your choice, PSP8 for me and export it as a jpg. Use the Leo figure to bring in the image onto a 2D surface, this will ensure the dimensions are correct. Turn off all shadow options, disable transparency, add the image to the ambient channel. Controll the diffuse via the alpha - which you make by copying the main image in the pict editor. Set alpha scaling. Then position your 2D face perpendicular to the camera and scale it so it fills the field of view. Now go back to considering the lighting. Oh but remember if you want it to show up then you will need to lift the ambient colour to make the backdrop glow. Poistions of other lights within the scene and the IBK if used, will bring it to "life". Like I said. It's a bit fiddly.

07.01.2007 21:06

gat
Member

Join Date: 12.21.2006
Comments: 667

Great scene, I really like the rocks and mountains, I think that your DOF looks better then bryce's. Great idea to use a terrain for those rocks as well. 5/5 Lighting is perfect too.

07.01.2007 22:31

Popgriffon
Member

Join Date: 03.10.2005
Comments: 59

I've noticed that you're posting smaller images recently - are they rendered so small or resized for posting? This left foreground terrain really rocks ;)

07.02.2007 11:23

tina gazcon
Member

Join Date: 08.07.2006
Comments: 254

Beautiful!

Nicely done David. 5/5 for sure. How do you use IBL? I think I am ready to try something new as far as lighting. I feel I have pretty much got the hang of using the technique that you taught me a while ago. Any help would be greatly appreciated! Thank you : )

07.02.2007 12:32

tina gazcon
Member

Join Date: 08.07.2006
Comments: 254

Beautiful!

07.02.2007 12:33

davidbrinnen
Admin

Join Date: 01.03.2004
Comments: 2224

The expert on IBL/HDRI for bryce is Horo, here is a link to his site. http://www.horo.ch/raytracing/sys/index_en.html - there is some good information there and a number of hdr to download and use. Most inportantly you will need Bryce6.1 to take advantage of the hdr. Bryce 5.5 and below does not have the capability.

As for image size, the renders are smaller due to lack or computer resources - to give you some idea, along with this scene I was rendering 10 other scenes at similar reslutions. The impact of all these parallel renders is to make the computer very slow indeed. During the course of this weekend I've rendered in excess of 100 scenes at this size, the workload spread over two computers. Given time and/or a faster PC I will go back to larger renders.

07.02.2007 14:26

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