Autograss plugin

[vlado]

There is a setting how much RAM will be used for the grass; maybe it is too low?

Best regards,
Vlado

[voltron7]

I believe that I've read that they did some major adjustments to the grass for those examples.
Maybe turn off g.i., etc. and as Vlado suggested about the RAM.
I am also not entirely pleased with the product, but, it was less expensive than VRS...
I am getting some decent results at the moment with some Autograss mixed with VRS.
I do like Autograss is really good for edges and smaller, more oddly shaped pieces of grass.

[emonimo]

Thanks for your quick answers.... the RAM limit is set to 2048 so I dont think it should be this... any idea?

Thanks again...

[voltron7]

Nothing I can recall, sorry. I haven't had to plant any grass for several months now due to a lot of interior projects, lately. I do remember doing some quick tests to find out how it would behave, just can't remember specific numbers...I just have 8GB RAM...

[emonimo]

thanks voltron7 I'll make some more tests looking to improve the render times... I'll share any coming idea...

[nirsul]

I was wondering it should be as fast as the videos they have in happydigital web, but perhaps they have speed them up in render time....

It is as fast as they show in the videos - I see no additional time cost at render time
Maybe some other setting in Vray is causing the delay ?

Leave the 250 MB limit as it si - it will be good for most jobs (even large Grass areas)

I did find something which is not so good - if you use more than one AutoGrass instance and use lots of polys - it may crash MAX

NIR

[Olli96]

Take a look at the sample files, they dont use any GI at all or only low BF Settings, thats why its so fast in their vids and examples. On a recent project i switched from autograss to Forest Pro because of the high rendertimes i was getting, it was fine for small previews but when it came to render the final animation the rendertime exploded. i havent used it since, i stick to forest.

[nirsul]

Try forcing it not to generate GI.
I always select all the plants in my scenes (even Forest Pack Pro) and uncheck the Generate GI option.

I use AutoGrass and FPP almost all the time at the same time


Nir

[PIXELBOX_SRO]

found a weird bug.
lets say you have a nicely setup grass that works perfectly....now...youre creating a new scene and you want to merge the grass object that works nicely from the other scene....you do that....select autograss gizmo and pick a new object for autograss to generate the grass on.
For some reason, in this case, the LC calculation can raise from 30 secs to something like 30minutes......
i ve replicated this problem in 3 scenes already.

So ...the conclusion is, you can merge the autograss object from older scene (if you like the way its setup), but u cant use it....if you create a new one, it will automatically pict paramaters from the old one, just as the vray cam does...

Best Regards

[claude_tnt]

erm.. i have at this save "slowdown" also... and its not related to autograss

[pnel77]

I also have problems with render times - which means animation is not an option!

[cecofuli]

IMO good grass quality render and low render time is impossible.
You can try with low grass length, no specular, low density, but I found that VRayscatter is better for rendertime and geometry quality. But for large surface VRayScatter consume a lot of RAM. But it's fast.
In VRaygrass you can't customize a grass, but you can cover a lot of surface, with low ram, but rendertime is high. Ah, and don't use SSS preset. It's rendertime killer!

[cecofuli]

Also important the Autograss memory limit. In my test:

2048= 3min 0sec
1024= 3min 44sec
512= 4min 55sec
256= > 6min

[cecofuli]

I don't know if cal that "bug". But I've a big plane with autograss. All CPU, node include, are 100% CPU usage if i render only the plane.
When I active my VRayscatter (not very heavy, just some tree) stuff, the CPU work from 50 to 80. VRay Memory = 4 GB , AutoGrass 1 GB.
If I render only the plane, without Autograss, but with VRayScatter, CPU usage= 100%.

And I can't do a grass with VRayScatter. Too memory consume with this plug. So... with both plug, we cant do a good grass plate in a big scene. Or waiting ages with my CPU run at 50%...

[cecofuli]

Hi all,

I've a question for how has both VRayScatter and Autograss.
In my scene, ifI render only a plane with autograss, all work fine. All CPU are 100%.
But, when I add just one VRayScatter object, for example, 100 trees, all CPU (WS and rendernode) go to 50-60-70%.
Autograss memory is 1024 and VRay Memory set to auto and 4 GB
WE memory available= 8 GB.

Any suggestion?

Thank