When you first apply the G3F genitalia to a G3F based character it will have no skin texture and usually looks grey.  With G1 and G2F the genitalia also looked grey when you applied it, but you could just apply the normal full skin mat for the character to the genitalia and it would be textured. With G3F this is no longer true. As Richard Haseltine indicated, the G3F genitalia has its own UVs and needs its own textures. V7 herself comes with textures for the genitalia, at least in the pro bundle that includes the genitalia, and so do the other characters that were included in the pro bundle. 

Not all G3F/V7 characters, however, include genitalia textures. You have to read the description of what is included carefully and if they do not mention a genitalia texture, it probably is not included. Some PAs have included a genitalia morph instead of a texture. This morph applies to G3F without the genitalia add on and is probably good enough for artistic renders, but not for hard core porn.

Some PAs have indicated that they are not doing genitalia textures because they include tattoo options and the genitalia with is own UVs makes doing the tattoos very difficult if the tattoo crosses the boundary. 

If your smart content is still empty, start up DAZ Studio and go to Help -> Troubleshooting -> View log File ....

It should open the log file in a note pad.  Scroll down through this file looking for something about "CMS".  In my log file I see:

Connected to CMS: PostgreSQL 9.3.4, compiled by Visual C++ build 1600, 64-bit

See if there is an error connecting to CMS.

I have been using Girabaldi hair since it was first released. Girabalidi works well with 3Delight. My avatar here is a render done with Girabaldi hair.

Girabaldi and LAMH both generate hair as 3Delight curves. Iray apparently has some curves but not equivalent and apparently not useful for hair. Both can generate an Obj file that can be used in Iray or Luxrender, but you have to reduce the number of stands generated.  You cannot do 100,000 curves, which is what I normally do with 3Delght.  The other issue is the shader. Girabaldi has a special 3Delight hair shader and a lot of the appearance comes from that hair shader. When you use an Obj to render with Iray or Luxrender, you are on your own as far as shader. I have never seen a Luxrender or Iray render of Girabaldi hair that looks as good as the 3Delight renders. 

The My DAZ 3d Library is located in public documents on a PC and is the default library used by DAZ Install Manager (DIM). I leave that library alone and let DIM manage that library. I install all content from other sources in My Library.

DAZ Studio supports both DAZ Format libraries and Poser Format libraries. The My Library and My DAZ 3d Library are folders that contain a DAZ Format library. Inside the folders for these libraries you will find a Runtime directory which is a Poser Format library.

If you get a vendor zip files with only a runtime with geometries,textures and libraries etc you can merge this into the Runtime folder under the My Library directory.

DAZ format products frequently also contain a Runtime folder, sometimes under the My Library or Content directory. This Runtime usually only contains Textures. Most DAZ Format products still store their texture files in the Poser Format Runtime library inside one of the DAZ Format folders.

Long time poser user here. Started with poser 4 .. I have Daz 4.7 and upgraded to 4.8 .. I am using the users manual to muddle my way through. Its difficult to get used to the Daz format. The download manager does not work all that well at times either.. Just purchased an item at Daz and tried to use the download manager ..says there is nothing there to download...I have the latest download manager..   You have great products but ......sigh.  

I have been using DAZ Studio for several years. There is now more documentation than there was a few years ago when I started, but there is definitely room for improvement. You can usually get most questions answered on the DAZ Forums, at least that has been my experience. I have been using DIM since it was released and think it is a big improvement.  DIM only looks for new products to download when it is first started or when you hit one of the buttons in the upper right corner of the window.  That said, it seems to take a little while between when you check out at the store and the information finds its way into whatever data base DIM uses. I've never really tried to measure how long it takes. It maybe in the 5 to 20 minutes range.  It may depend on the load on store website at the time.

There are download and installation instructions here:

Downloading and Installing DAZ Studio: a guide and FAQ

I would recommend using the DAZ install manager.

The category data is saved in the same data base used for smart content. A few releases back, DAZ changed from using the old Valentina data base to using PostgreSQL. At the time PostgreSQL was released there was a conversion utility that was a (free) product in DIM. It did not really install anything, but it created a PostgreSQL data base from your Valentina data base.

For a few bug fix releases DAZ Studio supported both data bases and you could pick which you wanted to run. PostgreSQL is faster and more stable than the old Valentina data base, but with the 4.8 release DAZ seems to be phasing out support for the Valentina data base.  It is apparently no longer shipped with DAZ Studio, although they say it is still supported. 

My guess is your categories are in the Valentina data base, but you 4.8 DAZ Studio is using PostgreSQL or else something went wrong in the conversion between Valentina and PostgreSQL.  

Did you install DAZ Studio 4.8 using DIM?  Did you install a product like Valentina to PostgreSQL data base conversion?

Now that I'm home, I tried to reproduce this, but I could not.

Also there is an update to Genesis 3 starter essentials in DIM that you might try first.

If you can reproduce this with a small test case, file a bug report at DAZ:

https://helpdaz.zendesk.com/requests/new

Realtime display of surfaces and lighting has been a very expensive and relatively recent thing in 3D.

But with GPU assist in Iray, realtime display is achievable and 'sort of affordable' to the hobbyist.

...here is one of Mec4d's videos:

This is a very impressive video, but you need to understand what is going on.  First of all, Cathy (Mec4d) has an impressive PC with two over-clocked Titan X  video cards. That is probably $2200 worth of video cards alone. This scene has only one 3D object in it, that is the SUV model. The street and buildings are an HDRI light and background

There are a number of free products that come bundled with DAZ Studio. The Genesis base figure you have is in Genesis Starter Essentials, which you must have installed. The Genesis 2 base characters are in the Genesis 2 Starter Essentials product, which apparently you have not installed. You should be able to find it in your product library when you log onto the DAZ site.

There are two kinds of expression products sold for G2F and G2M that I have seen.  One type are basically morphs that appear under expressions as Medzinatar shows above. There are some other G2F or G2M expression products that are basically pose presets of combinations of the build in expressions and the mouth and eye movement settings.

Neither of these types of expressions are really injected. What expressions are you trying to inject?

My credit card was used for two large unauthorized purchases on Mach 14th and 16th. It was the same credit card I used here for purchases on March 3rd, 9th and 14th. The March 16th purchase was flagged by my credit card company as possibly fraudulent and they contact me. They canceled that credit card and issued me a new one.

The March 16 transaction was rejected by the credit card company, but I may need to dispute the March 14th one if it makes it to the bill. We already told the credit card company it was fraudulent.

It is good to find out where the problem was and that it is now fixed. 

I don't see why it would not be possible to do.  I'm sure the developers of GenX could do it, but I doubt there would be enough interest to justify the development. I know the development of GenX2 took a long time, partly because of other commitments by Dimension3D, but also because it was a lot of work. There probably are simply not enough people interested in going the other way to justify the development.

Skin textures would be an issue also. Genesis 1 and 2 support multiple UVs, but V4/M4 only support a single UV set. Many skins for Genesis 1 used V4/M4 UVs, but most skins for Genesis 2 do not. You would have to use the map transfer utility and it can be hit or miss.

When I started using DAZ I had a 32 bit Win XP system. I could only get 3Delight to render tinny scenes. I used OpenGL a lot. OpenGL is not a not really a render, it is more of a fast preview.

I tried a 64-bit Win7 machine with only 4GB of RAM and discovered 3Delight worked much better on small scenes. I think 8GB is the minimum RAM for most work. I now have 16GB. I do use OpenGL for previewing animations because I can get around 60 frames a minute of animation and an OpenGL render is smoother and better than the preview window for checking motions in animations.

You might be able to get better lighting using Linear Point Lights.  Linear Point Lights have a fall off start and end distance. If you make the fall off start and end distance very large, a linear point light will light up the back ground.

You can also use environment lighting. The environment light that comes with DAZ Studio is called UberEnviroment. It is a little complicated to learn how to use, so don't be surprised if you don't get good results the first time. I currently use the Advanced Ambient light most of the time for ambient light, but this is not part of the DAZ Studio free package.