Could you elaborate on what you mean by lava dripping from the ceiling? Do you mean a large flow of lava continuously streaming down, or do you mean individual droplets? If your answer is the former, you could make a displacement to create a waterfall, and use a 'moving' texture to simulate the flow of lava. A tutorial for that can be found here
. If you want the latter, you'd have to make a custom info_particle_system, or use an existing one. I've never really heard of anything similar to what you want, but you are welcome to look under here
to find anything. As for making a custom particle system, I haven't the slightest idea on how you would go about doing that. Here is a TopHATTwaffle video
on the basics, but I'm not sure if this would be pertinent to what you are trying to accomplish. There's always the Request Area
, where you can ask other modelers and mappers kindly to make you something, but this would most likely would cost money, so use this as a last resort. I hope this helps!