How is the best way/plugin to close a hole in a terrain mesh?
I have 2 groups, terrain and building and I need close a hole, see the image.

Hi,

I have a terrain generate by TopoShaper amd I want project items on it.
I can use Drape tool from Sandbox toolbar but in this way the projection is part of terrain (drape tool add mesh on terrain. I need have the projection as separate object and show/hide it on terrain.

Is there a way or a plugin for it?

I need to tiling a wall.
I have to put a decor, so wall tiles are not all the same.

Can different textures be inserted at different points on the wall?

I installed the last version but I have only the "box" tools, no "target" tools. Any ideas?

Thanks for "skatter ($$) o raytracer (free) o component spray (free)" suggestion.
Visualizer doesn't work on SketchUp 2016.

I have a floor plan of an attic very irregular:

I have spend many time to draw the roof and the result is not a good result:

What is the best way to draw a roof like this (irregular plan)?
Are there some plugins that can help me?

I have assign material to group and all group items but I get the same result.

This is the model: https://1drv.ms/u/s!AsM-9m6nUHA9qTnr9qFgnsQdk4LD
This is the grass v-ray material: https://1drv.ms/u/s!AsM-9m6nUHA9qTpQIcNlENyawbhQ

@rspierenburg said:

Is the terrain grouped by itself?

Yes

@panixia said:

looks like you are using displacement without the "keep continuity" option (or whatever that's called in sketchup vray i don't remember) turned off, is that?!?

"keep continuity" is active on VRAY.
In any case the problem is the displacement. With material without "displacement" I don't have this problem.

On SketchUp I don't see these lines:

I don't understand because I see them on render