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Hi there,

i have a question. I have been tasked doing a 360 panoramic render for certain interior, which i did, but after seeing the result, client asked what focal length was it rendered at, that he guesses 35mm, and whether i could do it at 16mm.
So i checked, its set at 50mm by default, so i did change it to 16mm as asked to, went on to render, but the result is the same as the 50mm? No change between the pictures at all. What am i missing?

Thanks.

Hi,
it is a special camera, so, I think you can consider it at focal length = 0.
What makes the difference, is the portion of the equirectangular image you are viewing in the visor.
The bigger the portion, the lower is the focal lenght effect of the view in the visor, and vice versa.

ciao Beppe

bepeg4d wrote:Hi,
it is a special camera, so, I think you can consider it at focal length = 0.
What makes the difference, is the portion of the equirectangular image you are viewing in the visor.
The bigger the portion, the lower is the focal lenght effect of the view in the visor, and vice versa.

ciao Beppe

Thank you Beppe. So what you are saying the resulting equirectangular image will be always be the same, the difference will be, when i make the actual panorama out of it - but the different focal length will be up to me to set-up in the app, which makes the panorama? In other words, the focal length setting in the octane is basically pointless for panoramic cam?

Yes, if you load your Octane-Equirectangular image in a new scene, into the Environment node, and move around with the camera, zooming in and out, it will work as expected, you don't need to have a different image, if you change the focal length of the camera.
What makes the difference is the resolution, the more pixels you have, the more zoom in you can do.

So the original question could be "at what resolution has been rendered the panorama? and at which focal length we are looking at it?"

ciao Beppe

bepeg4d wrote:Yes, if you load your Octane-Equirectangular image in a new scene, into the Environment node, and move around with the camera, zooming in and out, it will work as expected, you don't need to have a different image, if you change the focal length of the camera.
What makes the difference is the resolution, the more pixels you have, the more zoom in you can do.

So the original question could be "at what resolution has been rendered the panorama? and at which focal length we are looking at it?"

ciao Beppe

I see. Funnily, i never thought about the possibility i can actually use panorama rendered by me as the environment texture....
Anyway, the render is not for me to be inspected in Octane, its for the client who i presume wants to put it on some website. So then its up to him, whatever software will he be using to show the panorama, to set it up with the focal length he wishes, right?

Yes, in general, Panorama scripts are offering the possibility to Zoom in and out, so basically the user can change the FOV as desired.

Happy GPU rendering,
ciao Beppe