It's been a while since I've done much work on any hobby stuff but I been trying new stuff with bases. Think the results are pretty good. Going for fighting in ruins on Mars, but colors can be adjusted to anything you need.
Does not require a lot of effort but you would need the texture rollers at the very least, I also used a clay roller machine to get the clay really thin. I imagine you could get even better results if you wanted to invest time into it.
This was done with the models being glued to the base after the base was done. The models are super glued to the base and they seem to hold pretty well.
These were glued to a standard base and the basing work was done around the model. I used smaller pieces of the basing texture and the rest was glue and sand.
Sheet of base material that can be cut into pieces and glued to bases entirely or in pieces. The material can be rolled really thing and dries quick.
Older base using green stuff and a different roller for a more chaos look
Not much of a tutorial but the steps I followed was;
1. Roll the modeling compound (I've had great results with Delight Air Dry Modeling Compound). Found it cheaper and easier to work than green stuff;
2. Use a roller to apply the texture/details. Got mine from Green Stuff World, would definitely recommend them.
3. Let it dry
4. Paint with primer (might be pointless step)
5. Super glue in place on base
6. Cut around base any extra material
7. Apply some glue in places where you want sand (skip for fully detailed bases) and dip in sand
8. Allow to try and apply paint. I used black paint, silver to dry brush metal and red/orange for the sand.