hello again, i'm havin a lot of problems with vue 8 xstream. i dono if flicker only exist in the xstream version but flickering is all i get when i render. i made a map for final gather I   tweaked all the possible settings and nothing much.
Is there any tip to not having flicker ?
thanks

I don't do animations, so can't help much but I do remember reading in some thread in this forum that texture anti-aliasing helps to reduce flicker. Maybe you can do a search to get more information.

 yea i'm working on this one. let's see . but i think there's lot more than this. thanks anyway :)

Don't remember where I found this from.  Have not tried it yet:

How to reduce flickering and/or noise in animations:

Introducing the Texture Filtering render setting!

Texture Filtering is an essential render setting to reduce noise and flickering that can arise because of high frequency textures (components of materials that exhibit very fine detail, usually finer than the size of a pixel). When used properly, it will lower the needs for strong object anti-aliasing (thus speeding up the render), and greatly reduce texture flickering.

Where to find it:

It can be accessed via the anti-aliasing options dialog, just above texture anti-aliasing options. This setting is always accessible, even for render presets. Its value is editable through a slider that ranges from 0 to 100%.

How it works:

This value corresponds to the size of the filter applied over textures during render. Ideally, this filter should always have the size of a pixel, so that all texture detail contained in each pixel is properly taken into account during texture evaluation. This corresponds to a value of 50% for Texture Filtering. If you specify a lower value, textures will be sharper but with more noise and/or flickering. If you specify a higher value, noise will be smoothed out but textures will appear blurred.

In practice:

You should tweak the value regarding your specific needs. In practice, the smallest value that yields good-enough results should be used. From our own experience, a default value of 33% usually does the trick.

Texture Filtering will influence two components at render:

1. Bitmaps: for each bitmap used in materials, if you edit its texture map node via the function editor, you will see a flag named "allow mip-mapping", which is checked by default. When this flag is checked, and if Texture Filtering has a non zero value, corresponding bitmaps will be pre-filtered just before rendering. Thus, at render time, distant bitmaps won't exhibit any noise or flickering. This is particularly useful when rendering animated plants, especially for distant ones. You will enjoy much smoother results, and a great reduction in flickering. As specified above, a value for Texture Filtering of 33% will generally produce the best results.

2. Generic texture anti-aliasing: when texture anti-aliasing is enabled, the Texture Filtering value will drive the size of the filter used by the texture anti-aliasing process, just like for bitmaps. This is very important because if texture anti-aliasing is enabled but Texture Filtering is set to 0%, you won't notice any improvement. Just like for bitmaps, a value of 33% is generally ideal for Texture Filtering used along with texture anti-aliasing.

 thanks a lot shawn. This has really fix some flickr but one weird thing is happening. 
The render is fine but some trees disappear in some frames and in others appears. What's the problem :S:S

Quote -  hello again, i'm havin a lot of problems with vue 8 xstream. i dono if flicker only exist in the xstream version but flickering is all i get when i render. i made a map for final gather I   tweaked all the possible settings and nothing much.
Is there any tip to not having flicker ?
thanks[/quote

You'll never reduce the flickering. Vue is only good for stills. I bought vue infinite 2 or 3 years back for $600 and still feel ripped off. They even lied about a special offer they were running at the time.

Anyway ... I digress. Vue sucks. Don't buy it.

well I think you need to give ur best to get a good result. 
Demoreels never lies. I know you can't do like these (maybe) but if u practice it u will benefit.

If no1 knows about why the trees are dispappearing well it's because of the wind. I removed the wind from the a. editor and voila! gd render no flickering....just the water surface has flicker cuz of the moutain reflection on the water. 
I'll try to tweak the reflections...Is there any tip abou this one?

Are the trees that are disappearing near the camera?  Or is it random trees at random distances?  Is your ecosystem regenerating for each frame?  Are your trees billboards?  Do they always face the camera?  Is your terrain regenerating and that causes the tree ecosystem to then regenerate?

i don't know as i said before the problem was the wind. How can i know if the ecosystem is regenerating for each frame?
And by the way. final gather mpa in mental ray is taking 3 hours per frame. I don't know whats the problem.

 ok ! i should present my project on thrusday. So little tim to render. I have a procedural map moutain, a water object and tree layer in the moutain material. Rendering time with metntal ray is taking more then. how can i make a framefor 30 min max animation.
plz i really need your help in this
thanks 

Converting from procedural to standard terrain speeds up rendering.

A year ago I had to create an animation in Vue 7. Due to time and CPU constraints it was very amateur-ish, but I learned a lot about render settngs fro animations in Vue. Check this thread out, it might hold some valuable information for you :-)

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2767824