Rendering just black takes a long time

[cyborgen]

Hi All

I just started a render.
I am rendering Stereo VR so have a high resolution and many frames

I am mainly an animator so never rendered so much in Xsi.
So it is a newb question.

I am just rendering some icons moving on a big image of
6144x3072 that needs to be keyed on original material.
the rendering of all the black empty area in my images takes a very long time.
I remeber that there was a setting that you could make so XSI did not calculate just black empty

I am just rendering in scanlines and turned down Aliasing down -1 1 5, even tried to minimum -3 0 1
what am I forgetting?

Sincerly Cyborgen

[opoppopopp]

every scene is different, only a clue, "black" not necessary truly "empty"
"truly empty area" should pretty fast.

or try to crop the render window as a workaround ?

[cyborgen]

Hi opoppopopp
Thx alot for fast reply


it truely is empty

Just curves and faces, with a blue texture

so Imagine that it is just because a very high resolution




Thx alot for showing me the crop
seems very useful

But the crop that you showed me
Is not the same as this one?

[opoppopopp]

also an "render selection only" at the bottom in the same property page, in my screenshot

BTW. for your scene, seems manually set the crop area is enough.

[cyborgen]

Still takes a long time - Crop is helps alot - halfs the render time, but not optimal
still chooses half the screen to render, maybe because of a Lens Shader, Panoramic


I only have those blue thumbs up in scene and rest is empty

https://www.dropbox.com/s/lvhrmnazgq1mb ... t.wmv?dl=0

[opoppopopp]

Still takes a long time - Crop is helps alot - halfs the render time, but not optimal
still chooses half the screen to render, maybe because of a Lens Shader, Panoramic


I only have those blue thumbs up in scene and rest is empty

https://www.dropbox.com/s/lvhrmnazgq1mb ... t.wmv?dl=0

without your scene file, only guess

- try make your object smaller, since "crop and render only selection" takes object bounding box I think.
- try click "Optimize" under Optimisation tab, It optimize each of your tile size etc. hence for heavy scenes it is speed up by reduce overhead(higher overall CPU utilization, basically). as shown in the follow pic

optimizse.jpg (44.67 KiB) Viewed 3889 times