Not aware of any tutorials on the subject, but.....

Yes, Carrara can use Grayscale images to create terrains.  Start with an empty scene, then drag in a Terrain object via the tool icons or front the Insert Menu drop-down.

That will get you into the terrain editor, from where you have lots of options in creating a terrain using the tools in the editor.  If you're not comfortable with the painting tools of the editor the you can Clear the canvas using the 'Clear' button and 'Import'  a height map  or displacement map available from numerous sources on the Web to generate a terrain, real world or otherwise.  First thing I would do though, is READ the MANUAL.  I know the documentation sucks, but even the Carrara 6 Manual that comes with Carrara 8 has a wealth of info that will help

That's putting it mildly.  I'm totally pissed!

I didn't merge the brows into the G2F figure, and as a result, the Brow dials in the Actor node respond properly, but the Brow dials in the Root node do nothing.  

Here's an example of G9 Card 06 Brows on G2F

Nicely done Dart!!  Love the sound track

I've also been exploring other options like 'Card' style pubes similar to what's used on the G9 card brows.  A lot lighter on system resources.  There's at least one PA that uses that type of method,  'HerYun' I believe uses that on a couple of his/her products.  I'm still experimenting.

I wish!!!  I've tried but without success.  Maybe Jonstark can wip something up

I noticed that. The posts seem to time out and go away after about 30 days of no activity.  I think that's what happens to people too. :-)

"not ideal for Carrara" is putting it mildly.  Looks like a giant PITA to me, knowing the uv issues of geografts in Carrara.  I would be tempted to do a Figure Merge inside DS using the Geometry Editor and reassigning the grafted geometry to their proper Regions.  Assuming that that works,  and transferring all the effected morphs, and then Adjusting the Rigging to Shape,  etc.  One might end up with a G9 with G8/8.1 uv's in Carrara.  

I know nothing about Ultimate Unwrap 3D Repaint so I can't comment on that option.

That link in the opening post does not work for me.  It's been a while since I've used LuxCore, but yes I love it!

That link in the opening post does not work for me.

Topology is totally different, and the shading domains are completely different as well.  That said, I'm sure someone will devise a texture converter in time.  But I also get tired of seeing the same old textures, tweaked a bit, on various characters, so I'm looking forward to new and fresh maps for G9.  I'm more looking forward to more Zev0 morph kits, like those that exist for every other Generation.  But for sure, I'm thankful that G9 works in Carrara without too much of a fuss.  Figure merges still don't work well in the latest beta of DS so I'm really glad that G9 works in DS4.10

This is my Victoria 9 WIP in Carrara using the Octane Renderer.  Still needs some work, like better lighting, finish the hair texturing, Some clothes, maybe, and background stuff.

Basically, there are three items in the scene, as far as the figure goes. the OOT hair for V9.  The default fiber brows that load with V9, and of course Genesis 9 with Victoria 9 dialed in.  She's a merged figure, that is, I merged the eyes, the tear, the gens, and also found some geograft nipples, all merged into a single figure.  All this was done in DS4.10, and as there are very few morphs available as of now, so not many dials to set (prior to merging).  So, with the hair and brows, saved in Carrara, she's almost 300 mb, with over 200 mb just for the hair.

the mouth and the lashes are in there too, forgot to mention.

Workflow is basically the same as Genesis 8.1.  Converted all the attachments to blended weight in DS4.21, saved as subsets, and then to character presets.  Merge was done in DS4.10, cause it failed in DS4.21.  File size in Carrara 15,051 KB.  Hoping that Zev0 morphs will catch up to Genesis 9.

Genesis 9 Female wearing Victoria 9 Skin.  Consists of Genesis 9, Eyes, Lashes, Brows (card), Gens and Tear and Mouth, merged into a single figure.  Still needs some work.