RBD render has moving noise on surfaces.

[jcoyle]

Hi,

I have the first tutorial. I completed the the RBD example with the falling cheese. I added a shader to the Cheese ( Frosted Glass ), and added a point light. I rendered with Mantra.


The problem is that, after rendering, the surface of the cheese objects has a moving noise even when the objects come to a complete rest at the end of the animation. I can scrub the last frames where nothing is moving in the animation, but the surface of the cheese objects has dancing pixels... it looks bad.

Is there a way to eliminate this moving noise on their surface?

Also, I wish you would have gone into more detail regarding rendering options in the tutorial. I now know how to create the models, and make them move, I just don't know how to get a decent picture out of the software.

Using H9.5, Mac, Mantra.

thanks,
jc

[sunder]

Hi jc. I'd love to help you out but I can't right now. I'll get back to you on this asap.

[sunder]

Hello jc. Sorry for the delay. Try and up your pixel samples to remove the grain in your images.
Rendering tutorials on Houdini using mantra and renderman are slated for a future release. If there's anything specific you'd want to see, please send your suggestions here.
http://www.digitaltutors.com/store/help.php?section=contactus&mode=update

[jcoyle]

Thanks Sunder,

I hadn't realized my post had made it through, just saw it today...

I read the Houdini documentation, and tried increasing pixel samples, but it didn't alleviate the problem. Could this be because when the rigid bodies come to rest, they never really come to a true rest... and the system still sees them as slightly moving?

I assumed when they came to rest after the fall, the render sequence would look like a still image.

...

For the future rendering series I would like to learn about the pipeline that professionals actually use. Do they render all at once, do they render in layers and composite. How to tweak all the parameters available in mantra. How to properly use lighting to improve the image. How different shaders, such as transparent materials affect the quality of the render. I would like to learn Renderman, but this is not available from Apprentice HD.


I was all set to buy all 3 Houdini tutorials, but I was so disappointed in my renders, that I decided I needed to learn this aspect of 3D graphics before I learn how to do more complex animation.