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Old 03-25-2013, 05:47 PM   #1
isaidicanshout
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Expanding the render area without altering the perspective

Hey all,

I am rendering a background for some product packaging, and I need to render more than my camera is showing. Obviously if I move the camera back I will see more, but the perspective of the objects will be altered.

I discovered Camera Offset, so I am able to shift the camera either right or left, up or down, and re-render to get more image without changing the perspective, however then I have to render upwards of 4 times to get additional image on the top left, bottom left, top right, bottom right.

Is there a way to get more image on all sides and maintain the exact contents of the center of the image?

Thanks!
 
Old 03-25-2013, 05:59 PM   #2
AdamT
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Adam Trachtenberg
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Increase the camera sensor size (camera object tab).
 
Old 03-25-2013, 06:30 PM   #3
Eszenyip
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Some of the guys in the forum posted this script months/years ago

var xres1 = 400; //this is the old width of the image
var xres2 =600.0; //this is the new width of the image;
var fov1 = Radians(62); //this is the old field of view

var fov2 = Degree(atan(xres2/xres1*tan(fov1/2.0))*2.0); //calculates the new field of view

println(fov2);

it outputs the value into the console.

hope this helps
 
Old 03-25-2013, 07:12 PM   #4
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look up the film zoom, film move and film magnify in the help file
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Old 03-25-2013, 07:48 PM   #5
AdamT
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Adam Trachtenberg
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Okay, more detail....

Say you want to increase the border by 20% without affecting the perspective or pixel size of your scene elements. Very easy:

1. Go to your Camera>Object>Sensor size and type [current value]*1.2

2. Go to your render>output settings, check the "lock ratio" box, and then type [current value]*1.2 in either the width or height.

That's it. If you want a bigger border use a bigger multiplier and vv.
 
Old 04-02-2013, 04:52 PM   #6
isaidicanshout
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Thank you AdamT, sensor size was exactly what I needed!
 
Old 04-02-2013, 10:09 PM   #7
isaidicanshout
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ok, so i've discovered a new problem. The sensor size doesn't seem to work properly with the physical renderer! Without changing any settings, the physical render output is a different angle than the standard renderer! Any ideas?
 
Old 04-02-2013, 10:42 PM   #8
isaidicanshout
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aha! turns out the sensor size/physical render was not the problem. my floor has a formula deformer on it and i didn't realize it was moving, so when i moved to frame 5 to get the motion blur i needed, the background was moving too! converting the formula to an editable object solved my problem.
 
Old 04-02-2013, 10:42 PM   #9
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