brazil w/ viz

trey · August 21st, 2002

i'm rendering some test images w/ the demo in viz 4.
is it me, or is brazil just damn slow. i rendered
a 640x480 image of a previous project. it has
500,000 polys. it took 12 hrs!
i used min sample of 2 to get a good image.
what am i doing wrong?
i've heard brazil is suppose to be faster than viz.
is that true, if it is, how do i make it render faster.

also, do most of you use the brazil material or stick
with the standard material?

thanks.

-Young

mzagorski · August 21st, 2002

Hey Trey,

I have been using Brazil with Viz4 as well as Max 4.2. It is definitely way faster than Viz's standard scanline renderer, but only if you set it up properly.

The main thing that you should try changing from standard is the Image Sampling. Change the Min Samples to 0, and the Max Samples to 4.

Try that and you should notice a difference. If you still experience slow performance post another message here and I'll try and help.

Have fun!

Mike

trey · August 22nd, 2002

mike,
i decided to test a smaller file.
my model only has 9000 faces wtih
one directlight.

using brazil: image sample:min 0, max4
GI:0,4
Sampling Control
view rate 15
sec rate 15

rend time was 15 minutes

using standard scanline: 5 seconds

how is brazil faster?
am i using the right settings?

trey · August 22nd, 2002

mike,
to add to the last post.
i'm using a 1gh/500mg ram computer.

also,
someone told me the demo doesn't
have the speed capabilites as
the full version.

do you know if that's true?

mzagorski · August 31st, 2002

Trey... Im no whiz with Brazil so I dont really know where you are going wrong. I have a file which is a car model, made using polys and meshsmooth.. Total size right now is 66,055 polys. It takes about 5 mins to render with all dafault settings other than setting GI to 0 and 4.
I also have the automatic ground plane too. My scene only has two lights.

It might be better to post a message on the Brazil forum beacuse that is where Brazil-ians hang out!

Mike

Tony · September 4th, 2002

Set you Image Sampling to min 1, max 3 and your GI Shade Rate to min -3, max 0. This will make a huge difference in render times. The Shade Rate is the key, you have to undersample in Brazil to get good results and fast speeds. If needed to clean up the shadows, up the Sampling Control view rate to 20-30 and the sec. rate to 10-15.

Trust me the GI shade rate settings you had are way to high and that is the problem.

August 21st, 2002	#2 (permalink)
mzagorski Senior Member Join Date: Oct 2001 Location: Honolulu, Hawaii. USA. Posts: 290 Name: Mike Zagorski	Hey Trey, I have been using Brazil with Viz4 as well as Max 4.2. It is definitely way faster than Viz's standard scanline renderer, but only if you set it up properly. The main thing that you should try changing from standard is the Image Sampling. Change the Min Samples to 0, and the Max Samples to 4. Try that and you should notice a difference. If you still experience slow performance post another message here and I'll try and help. Have fun! Mike __________________ Mike Zagorski

August 31st, 2002	#5 (permalink)
mzagorski Senior Member Join Date: Oct 2001 Location: Honolulu, Hawaii. USA. Posts: 290 Name: Mike Zagorski	Trey... Im no whiz with Brazil so I dont really know where you are going wrong. I have a file which is a car model, made using polys and meshsmooth.. Total size right now is 66,055 polys. It takes about 5 mins to render with all dafault settings other than setting GI to 0 and 4. I also have the automatic ground plane too. My scene only has two lights. It might be better to post a message on the Brazil forum beacuse that is where Brazil-ians hang out! Mike __________________ Mike Zagorski

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August 21st, 2002	#1 (permalink)
trey Member Join Date: Jun 2002 Location: atlanta Posts: 40 Name:	i'm rendering some test images w/ the demo in viz 4. is it me, or is brazil just damn slow. i rendered a 640x480 image of a previous project. it has 500,000 polys. it took 12 hrs! i used min sample of 2 to get a good image. what am i doing wrong? i've heard brazil is suppose to be faster than viz. is that true, if it is, how do i make it render faster. also, do most of you use the brazil material or stick with the standard material? thanks. -Young

August 22nd, 2002	#3 (permalink)
trey Member Join Date: Jun 2002 Location: atlanta Posts: 40 Name:	mike, i decided to test a smaller file. my model only has 9000 faces wtih one directlight. using brazil: image sample:min 0, max4 GI:0,4 Sampling Control view rate 15 sec rate 15 rend time was 15 minutes using standard scanline: 5 seconds how is brazil faster? am i using the right settings?

August 22nd, 2002	#4 (permalink)
trey Member Join Date: Jun 2002 Location: atlanta Posts: 40 Name:	mike, to add to the last post. i'm using a 1gh/500mg ram computer. also, someone told me the demo doesn't have the speed capabilites as the full version. do you know if that's true?

September 4th, 2002	#6 (permalink)
Tony Senior Member Join Date: Jul 2002 Location: Houston, TX Posts: 299 Name: Tony Richardson	Set you Image Sampling to min 1, max 3 and your GI Shade Rate to min -3, max 0. This will make a huge difference in render times. The Shade Rate is the key, you have to undersample in Brazil to get good results and fast speeds. If needed to clean up the shadows, up the Sampling Control view rate to 20-30 and the sec. rate to 10-15. Trust me the GI shade rate settings you had are way to high and that is the problem.

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