Render speed???

[Atyss]

Can you specify the actual render time and how long you think it should take?


Thanks
Bernard

[barnabythebear]

Hi Bernard,

No, not at the moment - i'm not at work. It was just an observation based on my experience with other apps.

ta


nige.

[mocaw]

That was my first impression as well- but fear not! It is more that mental ray has a lot of differnet ways of doing a render- and there are many optimizations that can be done. In short- no, with the right shaders, understanding etc. mental ray can prove to be quite speedy. You did what I did as a waver and went straight to the rendering- which IMHO is one of the best features of XSI, but also one of the hardest for wavers to understand.

Also which wine glass sample is it? If it's the one with the high reflection/refraction blur settings then I'll beg to offer the opinion that in no way is LW going to do the job faster. Try turning down the frost to something like .002 and the samples to two on each one. These are the settings that are "killing" your render times, and quite frankly I think they make this glass shadder look WORSE when higher. If you take these settings all the way down to zero then you should see a fairly speedy render- keeping your aa adaptive sampling somewhere between 0 and 1 with the threshold closer to 1.

For speedy fun try out some of the partical stuff, or play with FG at lower settings for very quick simple GI effects (even faster if you use the ctrl.irradience node which you can download).
Hiya all,

I have just downloaded the Foundation 5 trail and was wondering about render speed. I opened the sample scene with the wine glass and did a render region of the glass but I though that the render was slow. The machine i use handles max EIAS ans LW pretty well, is xsi considered a bit slow in this department (not trying to be offensive, i'm otherwise very impressed!).

ta


nige.

[3DDave]

How about posting some specs on your rig?

[EternalArt]

What is graphics card you are use ...

[JDex]

What is graphics card you are use ...

I'm afraid the graphics card makes littl to no difference on rendering. CPU is the predominant factor, and memory is secondary, but only comes into play when you run out of it (except for the contribution by it's speed).

Harddrive speed probably impacts rendering speed ij MR more than video card in 99% of situations.

[Sbowling]

Here's an interesting thing that just happened.

I've been working on this car animation and my render times were up near 11 minutes a frame with no motion blur. Since I really need this to render very fast I started messing with the BSP tree and didn't have a whole lot of luck. Finally, getting discouraged, I set the two main settings from 20 and 40 to 100 and 200 and the frame rendered in a few seconds... 8 seconds to be exact. That being said, these numbers are way too large and checkin the script editor show that the BSP was set internally to 70, but still, that is a huge speed increase. I guess I need to read up on the BSP tree... again. Maybe a little more will stick this time.

[Studev]

I never have such luck of dramatic decrease rendering time with BSP. It's excellent u brought it down to few sec only. I hope some XSI master here can explain something about BSP.

[Sbowling]

I never have such luck of dramatic decrease rendering time with BSP. It's excellent u brought it down to few sec only. I hope some XSI master here can explain something about BSP.

This was probably a case of being able to use more ram to increase the rendering speed. If your scene only uses a little ram or you have little ram, this may not make a difference, or (from what I've heard) cause a crash if you run out of ram.

I have the Softimage DVD that talks about optimizing the BSP settings, but I find it real hard to watch and real hard to remember what I did watch, because this stuff is boring (to me at least). Unfortunately it's very important in getting good render times and render quality. I'm going to have to take the time to watch it again. maybe this time I'll take notes.

[barnabythebear]

Hi,

Thanks 4 the response guys. Well, it's a mute point now as i've gone and brough my first pc (after years of macdom) so it'll be as fast as my poor budget has allowed! Look out for my dumb posts as i struggle with the foundation demo!

thanks


nige.

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