background image size
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@eclark1849 said in background image size:
@wallace11 HDR is a High
definitionRange Image that can be used as a light source inside some programs like Poser.High Dynamic Range. In electronic reproduction (whether of sound or images), dynamics is a word referring to the ability of the medium to reproduce both very high and very low signals. HDR TVs are new and most people don't have them.
The word definition (e.g. the D in high definition TV or HDTV) refers to lots of pixels in a smaller space.
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All the instructions to not use a background image notwithstanding, here's how I use a background image.
Load the image onto a rectangle prop (such as the Poser primitive one-sided square). Scale the prop as you see fit to achieve whatever height and width you desire.
Position the prop behind your subject(s).
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The prop can be set something like this:
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Adjust your camera to frame your subject and choose whatever render dimension you like.
Then move/scale the prop to place the background in the frame as you like.
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Invariably, the newcomer's next question is how do I prevent shadows on the background prop?
Here's how - connect it to the Ambient_Color, set to white.
You have the added benefit of being able to control the background brightness using the Ambient_Value parameter.
Be sure to set Diffuse_Value and Specular_Value to 0!!
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In FireFly you may ask why your background is blurry.
Texture Filtering has a lot to do with it. This is a complex topic but the beginner's answer is choose "Crisp".
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Those who are more sophisticated may note that my figure is lit from the front but, in the background image, the sun is behind the figure.
Well - yeah - you have to think about these things.
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Oops. Having moved the sun to the back, now the background prop is actually casting its own shadow onto my subject.
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Turn off the "Cast shadows" in Properties for the background prop.
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ghostship, So how do I set up and use the envirosphere. I downloaded from the link you sent.
Thanks
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@wallace11 It's a prop. You load it from your prop's library and set up it's material settings like I show up the thread. It is a giant sphere that surrounds your whole scene and with it set to ambient it will glow and light up everything within it. You'll want to delete the default lights as well as they will be redundant. The scene will be black and you won't be able to see anything so you'll want a light setup that lights up the scene while you are working but does not affect the render. I have a free light set that has a preset that does this.
http://www.sharecg.com/v/86639/browse/11/Poser/Studio-Portrait-Lights-for-Poser-11-Poser-11-Pro
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Don't know if you've tried, but there is also a check box on the image node called Auto-Fit. You could always try ticking it to see if that helps also.
I use the prop solution suggested myself too, but the checkbox could be a quick fix if all you want is a background..
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Auto_Fit has not functioned correctly for a long time.
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So long as your preview window is the same ratio as your background pic (which you can set if it's floating), auto-fit works. I literally just tried it in 11.1
Floating preview window, dimensions set to 800x500 (that was the size of a quick screencap I had done for some reason), auto fit unchecked.
Auto fit checked, it fills the background correctly.
Palaver? Yes. That's why I use the square prop method or an enviro-sphere. But it does work.
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can anyone tell me how to use this envirosphere. Downloaded it opened it with poser but then what.
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@wallace11 said in background image size:
can anyone tell me how to use this envirosphere. Downloaded it opened it with poser but then what.
Did you look at the other pages and pages of stuff?
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How can I get a shadow on the ground with this?
Obviously I need to add some plane to catch the shadow, but then how do I get a matching texture on that plane?
Or do I need seperate renderings and photoshop?
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@starlingblue I think @bopperthijs had a way to add shadows to a plane under the figures but I don't know how that is done.
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@starlingblue Bagginsbill has a shadow catcher on his web page as well. I have used it in the past, but it has been awhile. Not sure if it works with HDRI lighting or not. There are detailed instructions on the page for its use. https://sites.google.com/site/bagginsbill/free-stuff/shadow-catcher
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@ribroast I think it works for FF only, could be wrong though...
