How to make a shift camera effects ?

Tue May 01, 2012 7:47 am

Thanks Karba, that's very useful for any archviz artist!

Tue May 01, 2012 10:15 pm

Karba wrote:
tehfailsafe wrote:Nope, that didn't work, just looked really wierd.
Plus makes it impossible to match the camera to the vray camera I'm trying to convert.
What about this?

Great, so it works, is it implemented into octanes3dmax plugin?

Tue May 01, 2012 10:22 pm

acc24ex wrote:
Karba wrote:
tehfailsafe wrote:Nope, that didn't work, just looked really wierd.
Plus makes it impossible to match the camera to the vray camera I'm trying to convert.
What about this?
Great, so it works, is it implemented into octanes3dmax plugin?

It is implemented since first public release.

Wed May 02, 2012 8:57 am

Sorry to sound like a newbie but whats the benefit of this feature?

Wed May 02, 2012 9:22 am

mbetke wrote:Sorry to sound like a newbie but whats the benefit of this feature?

it helps to have pararel verticle lines.

In arch photography (or even in cinematography) that's one those 'must have elements' in majority of cases. Architects, developers or even some clients preffere to see this. It's an old 'rule', but still taken in acount today.

For an artist, it basicly gives You a bit of flexibility while trying to compose the shot, otherwise You have to hold (or point your virtuall camera) only in one direction leaving just paning possibilities to play with, while with shift You can actually take any angle and adjust You lense (or target shift) in order to meat that 'paralel line standart' =)

Wed May 02, 2012 9:41 pm

How would you work out the value for the LensShift? Is it just trial and error or is there a formula that can be used?

Wed May 02, 2012 11:16 pm

The X and Y numbers in cameraShift are multiples of the image width and height. If for example you set the Y shift to 0.25 it the view will shift up by 25% of the image height.

So if you know the point you want to have in the center of the image, and you know where it is in the image you can easily find the value. Suppose the image height is 1000px and you want to have a point in focus that is 200px from the top, which is 300px above the center. You need to shift the image 300px up, or 30% of the image, so set the Y shift to 0.3 .

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Roeland