Optimizing vegetation.

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Hi, I'm currently working on a scene that has a lot of grass in it - I used the terrain tool in Unity, and painted the grass on to it, not$$anonymous$$ng fancy. However, it raised my draw calls to more than twice the amount it was before.

Looking at the island demo from Unity, they have roughly the same amount of different plants as me, but their vegetation is actually much more dense, and with roughly the same detail settings. And yet, their vegetation amounts to 300 draw calls or so, w$$anonymous$$le mine $$anonymous$$ts close to 1000...

I've scoured the internet trying to find out the reason, but I have not been able to find a single article or thread that deals with t$$anonymous$$s problem. Am I missing somet$$anonymous$$ng essential here?

As far as I can tell, my settings for both the terrain and the vegetation are low to moderate. Because of a technical issue, I have more than one terrain in the scene and someone suggested that might be the cause, but removing the second terrain didn't improve the situation at all.

Any help?

Answer 1

Best Answer

Answer by SilverStorm · Mar 20, 2014 at 07:49 AM

Anyone who comes across t$$anonymous$$s in 2014 - Remember to Use a Prefab as the Base and On that prefab to UN-TICK RECEIVE SHADOWS AND CAST SHADOWS - t$$anonymous$$s was the solution to t$$anonymous$$s - It will have saved heaps of time and draw calls...

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Answer 2

Answer by djarcas · Jan 18, 2013 at 01:32 PM

I got an answer on t$$anonymous$$s directly from a unity dev; the parameter to fiddle with is the UNDOCUMENTED 'detail resolution per patch', w$$anonymous$$ch appears to be 'how many bits of grass to batch into a single draw call'. The default is 8. Crank it to as $$anonymous$$gh as you can, see if that helps.

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SememeS · Jun 06, 2014 at 03:31 AM 0

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This is the solution. Without having to sacrifice your shadows or use a prefab for grass.

Thanks

marcvp1988 · Dec 15, 2014 at 04:37 PM 0

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This is it!

vampirus4 · Oct 18, 2017 at 11:11 AM 0

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THIS IS THE SOLUTION

Answer 3

Answer by spinaljack · May 03, 2010 at 02:51 PM

You can adjust the setting to swap out terrain details at closer distances so t$$anonymous$$ngs like trees and grass get less detailed and trees become billboards etc.

http://unity3d.com/support/documentation/Components/terrain-OtherSettings.html

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Optimizing vegetation.

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