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I have the following setup enter image description here

in viewport the grass can be seen perfectly but as soon as I go to render enter image description here

the grass disappears, what is the reasoning for this? I have had numerous times faced this issue and everytime I'd start a new project it would work but then some other times it wouldn't work

Here is the blend file

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Well, there are some problems in the file:

  • The river is created with Geometry Nodes and a Shrinkwrap modifier, but it creates a desolate mesh.
  • The grass is then instantiated on the plane as a function of this, and is visible in the viewport, but not when rendering, because a different resolution is used here.

...all in all, this is an unfavorable chain of modifiers and events.

I have therefore restructured the whole file a bit:

  • first I create a solid river, which is also correctly trimmed at the edges and where no vertices are swept somewhere under the carpet.
  • I moved it to the collection, where all other objects are located, just like the ground plane.
  • Then I created a separate object for the final compositing of the objects, where I use Geometry Nodes to generate the scene.

And now everything fits:

enter image description here

Now this is a bit of a useless answer, because all this probably won't help anyone but you, but at least it might help you.


(Blender 3.1+)

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  • $\begingroup$ Thanks again for your help you have been amazing!, just wondering though what do you mean by desolate mesh and what can I do to not have this issue again because I've had other projects with same issue, where I would just restart the project completely I've done that 2-3 times and this was the latest case $\endgroup$ Commented Sep 5, 2022 at 0:47

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