Forum: Bryce


Subject: Photo as a sky

raiden1983 opened this issue on Jan 06, 2007 · 16 posts


raiden1983 posted Sat, 06 January 2007 at 12:19 PM

Hello everybody. My name is Piotr and this is my first post in here but not last  I need a litle help with sky in Bryce. I haveBryce 5. I saw in couple of works a nice sky. This was a photo which was used as a sky. And I have question.Maybe someone know how to create something like this?? Maybe you have a tutorial how to use photo as a sky. I will be very gratefull if somebody want to help me.
This is my email adress if necesary: raiden1983@gmail.com

P.S. Sorry for my english but my native language is polish


Ang25 posted Sat, 06 January 2007 at 1:26 PM

Hi raiden,
I've used my own photos on a primitive, I think the one with Leonardo's man or maybe a flattened box. I don't have bryce where I am right now. If no one else can give you better information, I will try later tonight or tomorrow to better describe what I do. I know that in the Material lab there is always a dot I have to fill in order for the photo to look right. Again, I'll check back later to see if anyone else comes up with better info for you.
Ang


pakled posted Sat, 06 January 2007 at 2:12 PM

Agent Smith is your man. It's a specialty of his. He used to have some free ones somewhere around here.

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)


tom271 posted Sat, 06 January 2007 at 8:30 PM

Hi raiden..    take your favorite sky hoto and place it in a file somewhere were you can find it....

Let me know if it made sense.... to you...



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tom271 posted Sat, 06 January 2007 at 8:34 PM

Oh yes... you might want to turn off the Atmosphere it could help...   there are also neutral skies you can use as background lighting for your photo sky composition....



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tom271 posted Sat, 06 January 2007 at 8:37 PM

Here is a photo sky I used in Bryce.. the sky you see is a long rectangle I made from a 2D surface.. I positioned the camera so it does not see the naked sides....



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raiden1983 posted Sun, 07 January 2007 at 12:54 AM

Big thanks Tom. This help me very much.Thanks a lot :):)


skiwillgee posted Sun, 07 January 2007 at 8:17 PM

Attached Link: http://www.renderosity.com/mod/tutorial/index.php?tutorial_id=843

Here is another approach from a tutorial at renderosity.  see link

jfike posted Mon, 08 January 2007 at 6:42 PM

.... a few more tips.

Before adding your sky photo to the 2D plane, set the plane to a nice bright material (one of the simple and fast, like red, green, or blue work nicely.)

Make sure the 2D plane is perpendicular to the camera.  As you move it back to get it behind the other objects in your scene, that bright color is easier to see.  You want the 2D plane to cover all the open sky area, but be as small as possible to accomplish that. 

When you get the plane positioned, you can not change from the bright texture to the photo.

Even with the atmosphere off, the sun position is very important -- not just for your scene shadows, but for how bright your sky photo looks.

Some objects may cast shadows to your sky photo.  Select those objects and turn off the "cast shadows" if you want to avoid that.

This same procedure can be used to make "camera filters" or to simulate something like rain.  Here you would bring the plane up to the front and use transparency.

I like to make scenes without post processing, so I made my signature/copyright into a 2d plane object, which I can add to the render.


raiden1983 posted Tue, 09 January 2007 at 2:23 AM

Thanks for all yours help.I'll try it all :):)


serendigity59@gmail.com posted Wed, 10 January 2007 at 1:13 AM

Here's an example of one I have done. I made the 2D plane for the sky have lots of ambience and made it 20% transparent and had back lighting to simulate the sun. I made the Bryce sky plain black for this and has another light near the camera to create some scattered light effect.

danamo posted Wed, 10 January 2007 at 3:51 AM

I use the 2D imported background sky technique quite a lot and I thought I would share some of my own findings with you.  You do not have to switch shadows off per object if you uncheck cast, receive, and self shadows on the 2D plane itself.

danamo posted Wed, 10 January 2007 at 4:05 AM

As Jfike said previously; you can also use a sky, or rain, or snow etc. 2D pic as a "camera filter", or scrim( theatrical set design term) if you make it semi-transparent and position it in front of background objects or terrains. Here I've painted a sky and mist background in PS and imported it as a 2D background. I just added a "marble" to the transparency channel, and put it in front of a background hill terrain.

danamo posted Wed, 10 January 2007 at 4:18 AM

I added a couple of background hill terrains on the left to complete the near and foreground, and added some trees to finish it off. I deleted the ground plane(seldom use one) and used a plain blue background sky preset and adjusted the sun and background pic transparency to blend everything together. I'm not against postwork, but I didn't add any to this pic. Good luck, and happy rendering. Dan

raiden1983 posted Wed, 10 January 2007 at 5:34 AM

Thanks for all of you.
I found tut about sky in Bryce.This is link: www.geocities.com/asperen290573/tutorials/tutorial6.html
ANd this is what I get after read this tut:  www.renderosity.com/mod/gallery/index.php


jfike posted Wed, 10 January 2007 at 5:50 PM

One other point with using an image for a sky: the horizon may look wrong.  With the Bryce sky you can adjust have, cloud height, fog, etc.  Using a image, you have to simulate that.

I didn't put much time in this and it shows.  However, with some tweaking it should look decent enough.

Anyway, what I attempted was to position a cube that stretches across the horizon and intersects the 2D plane and the ground (or water) plane.  I then used a volume material to try to get the haze look.

The great thing about Bryce is the many different ways one can get some pretty good effects.