Honestly, I wish I had the time to make more terrain to use, but I find I can't even get round to painting the models I have. I suspect I'm not the only one with that problem.
I DO, however, have an interesting Khornate pool of blood. Picked up an ashtray from a car boot sale that was skulls all the way round, with 3 rests for cigarettes to sit on and of course the middle was hollow. I filled that up with milliput, painted the middle red and let it flow out of the cigarette rests, and painted the rest to look like stone. Voila! An objective.