OTOY Forums

I'm working on several renderings using background images in C4D.
As you know there is a tag "camera calibrator " to properly align your image in background with the 3d inserted objects.
After aligning the camera correctly, I tried to render at first with the plugin, and then also in Octane Standalone.
In both cases, you will lose the correct alignment of the scene, as you can see from the pictures.

I also tried to copy the data of the position of the camera of C4D to Octane camera. In view port of C4D, if you select the Octane camera or the C4D camera it does not change the point of view, but when I start rendering the point of view changes!

I tried exporting the scene .obj, even selecting the camera, and than launch the rendering in Octane Render Standalon, but the problem is very similar, going to place the image in the background the deviation is quite evident.

It is very laborious and difficult to work with the controls to bring the prospect into the correct position . The severe lack of UNDO command makes it even more difficult attempts of accommodation.

Another big problem is the background image that disappears whenever you reopen the .ocs file! The path remains on the dialog box, but if you select "apply" nothing happens. You have to reopen the path and select the image, the proogram moreover does not store the path, and then search for it is very annoying if in nested folders .

Do you have any suggestions? I have lost too much time to try a solution.

what kind of effect is produced by this tag? only is it modifying camera transforms or does extra deformation?

well, i have compared your renders. There is no different on geometry outputs between standart and octane. Only different is background scaling. Also rendering to viewport will not give correct match. Only Picture Viewer is correct.
Pls check my scene on Picture Viewer

Standard <--- D not T

Sorry, but in your scene you haven't calibrated the camera as you can see in the image. The red squares in all positions mean not calibration.
I find only a grid, but it's non sufficient to determine the position of camera and his focal lenght.
I haven't seen a difference between Picture viewer, live viewer and view you have told.
In my scene the camera is calibrated so that the furniture have the right dimensions and the right perspective.
What I had written was that only the Standard rendering of C4D was correct with the background image.
I think the problem is in some parameters of camera in the program, because I have find a solution to this problem, for now only in Octane Standalone.
I have changed the setting of "Field of view" in the Thin Lens Camera settings from Logaritmic to Linear distribution ad than I have fine tuned the exact position of the background only with a little moving of "Scale of view".
I think the programmer must take a look at codes of programmation and find a remedy at this strange behavior.

sorry, but i think we don't talk about same thing. There is no matching problem with standart render and octane, as we know. if you can provide a scene which shows difference, pls post here.

http://render.otoy.com/forum/viewtopic.php?f=30&t=40348
Maybe Similar My Case. C4D Camera & Octane Camera Little Different. I don't know Why...

aoktar wrote:sorry, but i think we don't talk about same thing. There is no matching problem with standart render and octane, as we know. if you can provide a scene which shows difference, pls post here.

Hello Aoktar,

Actually, I think you are talking about the same thing.

A few projects back I also ran into this issue, but worked around it.
It appears that the octane render camera and the calibrated c4d camera do not correspond entirely.
For our project, I did not investigate because of a tight deadline.
Instead, I aligned the camera manually and corrected the small inaccuracies in post.