Show Us Your Bryce Renders Part 11
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Two terrains and a pre-rendered sphere as a spherical panorama from Bryce volumetric clouds. Ambient light by an HDRI and the key light by the sun.
What is "no curse of the black edge"?
Atoll
Slepalex - very nicely done atoll.
Slepalex.......That's what i call it when i get to the edge of the terrain when navigating around looking for the picture ....I delve into every nook and cranny looking for the shot
Slepalex....forgot to say I like your atoll
The clouds look very beautiful.
What is the size of the image of a spherical panorama?
Slepalex - thank you. For the clouds I rendered 6 images at exactly 90° AoF (FOV 112.5°) with a square aspect ratio in the size 2620 x 2620 pixels and saved them as 48-bit TIFF, then assembled them with Pano2VR5 to a spherical panorama of 8320 x 4160 and rescaled it to 8192 x 4096 in Photoshop. Finally I flipped it horizontally and shifted it right by 4096 pixels in HDRShop and saved it as 24 bit BMP. The last step is to create the same sky when mapped on a sphere the size of 104200 BU (Bryce Units) as the original cloud slab. The cloud slab uses much less memory but also needs a lot more time to render.
Horo ..sorry i meant to say how much I like the sky and scene it has a lovely fresh feel with great lighting
Well, I roughly imagined that.
The only plus of the image of a spherical panorama of this size is the short rendering time and the limited good quality (resolution) of the clouds.
Minuses:
1. Rendering a 8320x4160 image takes from several hours to several days with volume clouds. Not counting the time to build it in Photoshop.
2. The file size of a scene with such a panorama is increased by 100 (or 300 or 500?) Mb.
3. If I put a lot of grass, OBJ trees, etc. in such a scene, then there will not be enough computer memory.
****
I somehow tried to render a spherical panorama with voluminous clouds (albeit a long time ago) much smaller. When the first pass showed me a render time of several tens of hours, I abandoned this venture.
Horo, now another question: Did you also include a portion of the Bryce space below the horizon in the panorama image?
@ spuddy - very nice terrain
@ Horo - this is so an wonderful island
@ Slepalex - what an beautiful Atoll. I like the palms.
I have tried to create a double stacked terrain and hope that is correct.
Slepalex - file size of the scene above is 17.6 MB, memory used by Bryce 225.3 MB (the sphere needs 130 MB). An empty scene, without ground plane but with the visible sun and haze, no clouds, only the cloud slab was rendered. So yes, the whole Bryce world is in the panorama. For this sky, the 6 cube faces took only 4.5 hours to render. I made 18 such panoramas, the fastest rendered the 6 cube faces in 1.5 hours, the slowest needed 30 hours (over a day). Obviously, the ground face of the cube renders very fast, within minutes, there is only the haze. Most of the time to render needs the zenith face because it is full of clouds. The faces of the 4 sides take less time because only the upper half has clouds, the lower half again only the haze.
A 8192 x 4096 24-bit BMP takes up 96 MB, a 96-bit HDRI of the same size 384 MB. Yes indeed, 30 hours rendering for just a sky is very long. But you save a lot of render time each time you use it - and it is versatile, because you can rotate it, and 100 MB memory is is not overly much. If you use the slab, you can save 95% or more of this memory and it does not need that much of time because you render only the scene, not the whole sky. Another disadvantage of using a pre-rendered sphere for the clouds is that there are no shadows on the ground from the clouds. As the saying goes: "there is no free lunch".
Rieke77 - thank you. It does not look wrong. When I stack terrains, I use them in different resolutions and give each one a simple colour (e.g. red for the 4096, blue for the 2048 and green for the 1024). This makes it easy to adjust them against each other. Only then I give them the materials. You can also use copies of the same terrain and move, rotate, scale them a bit against the other(s).
spuddy - thank you.
Horo : Awesome texture on the terrain with the train. The spherical panorama is lovely.
Slepalex : Superb double stacked terrain. The Atoll is simply beautiful, a very nice place.
Spuddy : very impressive renders.
Rieke77 : very well done double stacked terrain.
adbc - thank you.
Horo, thanks for the detailed explanation. That’s how I imagined it. The camera coordinates in this case XYZ = 0; 0; 0?
The lack of shadows from the clouds is not the biggest drawback. This can be compensated, for example, by several spotlights that illuminate the scene here and here with negative light. Or one spotlight with a gel texture. It is much worse if real volumetric clouds give a shadow not where it is needed. But this, too, can be circumvented by turning off the sun and using "distant light No. 1" (exclude Slab). "distant light No. 2" illuminates only Slab (on).
And if instead of spherical to apply a cylindrical panorama, using only the side faces of the cube? True, when rendering a real scene, you cannot use a wide angle of the camera or direct it to the zenith.
Slepalex - you are welcome. No, the camera is not at world centre, the sphere is so big and with 102'400 BU nearly as far away as the sky or an HDRI that the camera position usually does not make any difference; but the sphere is in the centre. Bryce has so many options that few experiment with. Like a distant light for the sun, negative light, parallel light with infinite width, HDRI inside, exclude objects from light, shadow intensity (except for the sun which is a global control) and so on. I have learned a lot from others (mostly at bryce5.com when there was much more activity).
Yes, a cylindrical panorama can also be used but it depends - as you say - on the camera being set horizontal or looking a bit down. A cylindrical panorama need not be half as high as wide, it can be higher but if you exceed 120° vertically (+/-60°) the distortions become too obvious.
The panorama as background, whether cylindrical or spherical, must be wide enough to have at least 1 pixel of it in the rendered image to appear sharp. If the panorama is 3600 pixels wide and the camera FOV 60°, the render should not be wider than 600 pixels because 60° FOV shows only 1/6 of the panorama (360°) and therefore only 600 pixels of it. But you can use DOF to blur the background and nobody sees that the panorama is too small.
Horo - The spherical panorama is awesome.
Slepalex - The Atoll is superb, a very nice place.
Spuddy - very nice house on the hill render.
Rieke77 - very nice double stacked terrain.Horo has a pdf on this site on stacking terrains.
Spuddy, Horo, Slepalex, Rieke77: nice terrains all around.
Thank you everyone for your comments
Rieke 77 very nice I like the contrast on the mountain
I watched you tube video Stacking Terrains by HORO which was very well made and explained ...got a bit lost on the lighting but am working on that a bit at a time
here is what I came up with as a tryout nuch to improve on though
That is another very nice terrain, spuddy!
@ Horo - thank you very much and your tips are very helpful
@ adbc and Hansmar - thank you so much
@ mermaid010 - thanks a lot and now I´m going to search the pdf
@ spuddy - thank you and your terrain looks great
mermaid - thank you.
Hansmar - thank you.
spuddy - that's a great start.
Spuddy : Very nice terrain.
Hansmar...thank you
Reike77..thank you also
adbc.....I also thank you
Horo ....thanks couldn't have tried it without your video I learned some other things about navigating the bryce interface which I am pretty pants at and using the perspective camera to navigate that was a great one ..there is so much I don't know yet but slowly slowly
Summer day in the village
Slepalex : Excellent and very detailed landscape. Beautiful !
spuddy - you're welcome. By the way, I have a couple of memos from some videos on my website. One page PDF summaries I made mostly for me because I tend to forget one or two steps to help me find where I went wrong without watching the whole video again.
Slepalex - very beautiful render, the Arboro trees look excellent and the rest of the vegetation is also awesome.
Spuddy - another great terrain
Slepalex - very beautiful, realistic, very detailed landscape.
I played more with the hyper-textured mirror effect from David, info found here: https://www.daz3d.com/forums/discussion/53147/show-us-your-bryce-renders-part-9/p48
And an Anaglyph.
River bend