Maya Live Render?

[cicli]

HI!

I have a maya live scene with an object.

But when I render that scene my video it's out, where is?????????

An other question....

If I do the playbast my scene is black

How I render my scene, Is necessary render by parts? shadows,objets and then composite in a video program?

Thanks and sorry for my ugly english.

[bluezaza]

Good Question...someone please help!

[joojaa]

QUOTE(Carballo @ 12/09/08, 12:35 PM) [snapback]296707[/snapback]
How I render my scene, Is necessary render by parts? shadows,objets and then composite in a video program?

No its not you could put the video in as imageplane and render that. HOWEVER because:

you need a comp software anyway ( trust me on this if you have maya but no comp facility then your not making allmost 1/2 of the work anywhere near optimally. Usually this means your not making the progress you should)

Because your data needs to be matched in color

Some possible roto is needed to make the parts work correctly

Its usually a LOT cheaper just to do some part of the work in video post. So you shoudl be doing just that.

Its not must I, its you may and its better that way.

[bluezaza]

i found the response quite confusing...anyway, i got some help from the MAYA Help files: \It is recommended that you render the animation created in Maya separately and then use a compositing software application to combine it with the life footage. However, if you DO want to render the image plane, you must turn off the =Use Cache= check box. This check box if found under =maya live = Scene = Live Controls (check mark) - Setup (on the left drop down) = Cache (circle checked) = =Use Cache=. This option utilizes a Roto node, which does not render. By turning =Use Cache= off Live switches to the standard Maya image plane, which is renderable.\
When I did this I ran into a problem. The image plane and animation do not follow each other. The full animation seems to work only when the =Use Cache= box is checked on. Please help us people, who chooses to render the entire scene in MAYA, figure out how to render the Maya animation and the Image plane from Maya Live tracking. Thanks.

[joojaa]

Yes its confusing if you assume maya is a all in one package its not.

QUOTE(bluezaza @ 01/02/09, 09:07 PM) [snapback]298038[/snapback]
When I did this I ran into a problem. The image plane and animation do not follow each other. The full animation seems to work only when the =Use Cache= box is checked on.

Ok let me clarify this to you, if you have the cache on it will update in maya view pors in different way Rendered image and viewpoints work wildly differently, never take any hint form the ogl on what will happen on the final render if anything their sameness is more coincidental than anything else. They dont work on teh same technology. Its about as close as comparing driving boats with driving cars, many of the things yield same result the experience is wildly different.

Back to the subject

Now the renderer is a bit picky on the types of things it can render out form. While you can import a avi file into maya in windows for example, the render does not really like this. For certain obvious technical reasons. Also some renderes dont support some formats right. Even tough maya may seem to do so. TIF being the ulttimate you can screw things up with this format kind of thing.

So once you unceck the use cache nothing updates in your view port that is fine your not rendering with your view port. So stop thinking in terms of what you see, it deceives you half the time. Thats why its called a preview. So if you loose the images updating that's to be expected it only signifies there's naming disparity

The catch 13. Maya live nodes would accept files with wild different namings. But the standard maya imageplane node is MUCH MUCH more picky. So you will need to ensure that if your frames are named. something like:

blabla10.ext
blabla.10
blabla0001.ext
etc.
[b]
then you will need to rename them to

blabla.0001.ext[/b]

Otherwise it will not work. (some versions of maya are more lenient on this factor in any case its not allways the newest maya that's best on this subject so always use that convention, length of padding is arbitrary maya even understands non padded)

Let me guess your naming convention is foo0012.ext?
So now jump out to your trusty old command prompt/command shell and do quick rename. takes about 0.1-0.04 seconds per image. then relead the images again and try anew.

now your done.

QUOTE
Please help us people, who chooses to render the entire scene in MAYA

I am helping you by telling you that's a pathway that will lead to much much pain for you in the future. Thats the truth. Thats why no one sane would tell you to do this completely in maya. The fact that it does not answer the question does not diminish its truthfulness.

I mean you even get worse output pssoibly for longer render times. On the other hand you do get refractions right (even so i would use it not as primary source and comp in anyway).

Dont think its extra work, because its not it takes 1 minute to set up so that it launches directly into state thats ready to eat this. Think of it as a freedom of doing what you want done.

So yes you can do this but you should not, its more prone to error and does not diminish your need for the comp app anyway. So you still need to use whet you want to avoid if you want to be proper. Coincidentally the proper pro way of doing this would be:

Import footage to your comp app

• in comp app de noise the footage, measure alpha and adjust levels
• get the difference between original and denoise
• Un lens distort the images

track footage (usually not in maya live but it will do in pinch, you can get better trackers for peanuts. Ones that track without any or little user input for example)

Render out the mask plates

render out the 3d plates

Any plates used as refractive should be gammed down to a linear gamma space beforre render

Switch back to your comp app

• load the new footages
• Gamma them up, color correct to match right
• Re lens distort them
• Add any blooms and lens flares and other post effects (athmospheric haze, lens blur etc etc)
• reintroduce grain to them
• render out final frames on top of the original fiootage and beneath any in shot color correction match.