maya camera focal length issue

[peterk]

Imported .sd object (poly geo) with animation into RF and rendered it. The render output doesn't line up with the same camera render directly out of Maya. The default cam in Maya is 35mm with and Angle of View of 54.43. RF is reading the camera as FOV 37.84929. If I change the RF camera to 54.43 its worse. Seems like the RF cam needs to be changed to a FOV of about 30 to work and even that does seem exactly right.

I guess I'll use the bin files imported into Maya but I'd really like to understand why the Maxwell renders out of RF 2014 don't seem to line up with the Maya renders.

[LuisMiguel]

Hi peterK,

There was a script to help with imported cameras from a 3d platform. You can take a look at this link below.

https://luismma.wordpress.com/2012/03/0 ... -realflow/

I hope it helps.

luisM.

[peterk]

Luis,
Ok, I'm very new to RF so please bear with me. F10 open script and RUN. If I already have the .sd with a Maya cam imported I get WARNING: WARNING: Script error: Bad number/type/range of arguments at function "Scene::message".

I renamed the imported cam "cam" and I tried running the script with the camera selected and unselected, cam imported and pre-importation. The FOV number doesn't change after I run the script (I realize it's the "wrong" dimension, but it should still change right?)

I also ran the script with a dummy poly cube that fills out the HD frame in Maya and it doesn't change it's "size" so I think I'm doing something wrong here. something simple probably. ; )

The script does seem to return a number in my case 20.0 or 21.0 Is this the new vert focal? it looks wrong if I replace the FOV field in RF with this number (the cam becomes REALLY close)
Thanks for putting me on the right track.

pk

[gus]

Hi Peter,

Quick one. Forgetting about the script for a minute, when you render with Maxwell using Maxwell Preview inside RealFlow, do the images come out correctly? In our tests it seems that there might be a bug in the command line option for previewing with MW but not there, so please bear with us on this one.

g-)

[peterk]

I don't have much to base it on. I have grainy images (even at full rez, w/o alpha -that is to say married to the gradient BG) I'm planning on bringing into AE and motion blurring so I can prob deal with that. This is for one short section of an animation where we need to really "see" the droplets. The output still doesn't have an alpha from what I can see, but I can use the EXR channel as a matte.

[LuisMiguel]

Hi Peter,

Alpha is working when exporting the EXR from Maxwell settings. Make sure you have the Production render activated instead Draft besides the export Alpha embebed in the EXR. Once you send the Maxwell to command line, the EXR including the Alpha channel will be exported properly. I send you an image so you can see in nuke how it is working.

About the other question about cameras, it is working in this way right now, but it seems be a simple bug. The workaround to get the same W/H for the camera when exporting is setting the image Quality in the maxwell settings to 100%.

luisM.

[peterk]

Do the clipping planes render inside the package? The Maxwell renders are looking very different from what I am seeing when I use the FIRE button to render a single frame. Can I send my file to someone?

[gus]

Hi Peter,

I don´t think we do have clipping planes. Maxwell Render inside RealFlow is supposed to serve just as preview renders, not final, for now, so there is only a subset of the functionality that you get within a 3D package such as Maya with the MW plugin there.
Regarding the FIRE window, if it is floating, the resolution is capped to 640x480, but if you dock it, you will get the docked panel size.

You can send the file via the customer gateway to our support team.

Best,

g-)