Most vegetation we buy where I work seem to rely heavily on alpha which slows Cycles down . Has anyone here converted such vegetation to geometry instead, and if so, how did you go about it? For example, the first step is to separate everything into loose parts (built-in command): [image] Then w…

Hey there, I have the same problem here. In CAD data you often got many identical parts which simply should be instances. I am working on a script but it does not work properly at all right now. I want to checkout this soon (being ill atm): https://extensions.blender.org/add-ons/select-similar-geom…

I had to rename the thread because I think I just found a solution a bit out of left field… [image] Add a really dense subdivision modifier to your vegetation [image] 2. Add the following geo nodes to the same vegetation [image] 3. Decimate and done Obviously needs tweaking and you should …

Ingenious! Earlier I was going to suggest selecting all of the separated leaf objects and Ctrl+L > Link Object Data, but the result would have been too crude to be worth the bother. I wonder if there is a way to systematically shrink the UV maps past the alpha borders now that you’ve captured the …

Unfortunately not that ingenious because seems a Blender bug messes things up… When you copy modifiers to multiple leaves, you get garbled results until you manually disable and then re-enable the modifiers on each individual one. [GIF] :frowning_face: Wonder if some sort of geo nodes caching wh…

https://superhivemarket.com/products/cut-and-wrap

That seems exactly like the geo node I posted above, but they leave quite a margin in all of their examples, meaning they don’t really remove the alpha requirement at all. Plus, I got to a case where this method really doesn’t work well: [image] “Only” 66 million polygons, yet it takes 10-15 min…

With all the performance issues you are running into here, couldn’t you just crank up the transparency bounces in cycles?

You know how some engineers spend longer time automating a task than what it would have taken to do it manually? I’m in that hole now. :sweat_smile:

Game recognize game. I spent a week building a bisection node group because mesh booleans are too slow.

[image] eobet: That seems exactly like the geo node I posted above, but they leave quite a margin in all of their examples, meaning they don’t really remove the alpha requirement at all. If the end result still uses alpha, but with a reduced empty area around the leaves, it should still impro…

Automate converting alpha vegetation to mesh

Technical Support Modeling

marcatore (marcatore) January 13, 2026, 7:45am 12

About plane+alpha to mesh convertion…I don’t know if you have seen this…

Could be useful? I don’t know if has the same issues than the others.