I have become a subscriber for UE4 engine today.
I am an indie developer working on an RTS / Wargame. The game is set in the mid 18th century Europe.
Needs loads and loads of characters (in fact a whole army) moving inside the view frustum. I am investigating efficient techniques for
a) hardware instancing
b) hardware skinning
and
c)particle effects at larger distances from the camera.
The UE4 forums and AnswerHub seem like great places to get some serious help. Thanks for all the contributors. I hope to contribute in my own modest way when I have a few more feathers on my UE4 cap.
Exciting times ahead!
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Awesome!
When you have any problems just let us know and we will see if we can help you 
, thanks for the warm welcome!
I successfully built the engine yesterday night. But right after I loaded the RTS game sample, my PC went belly-up. Time to upgrade I guess.
I am running an AMD quad core motherboard at 2.3 GHz, Radeon HD 5770 and just 4 GB of RAM. Heading out to the PC store now 
BTW, , I do have a tricky issue that I am wrestling with. It is called hardware skinned instancing. It is about loading the bone matrices from an FBX file into texture mem, calling the bone matrices in the GPU vertex shader and let the GPU handle the skinning and animation.
Do you know anyone on the Unreal development team that I could talk to?
Thanks
Built a totally new development PC yesterday.
i7 processor, 4.4 GHz
16 GB of RAM
NVIDIA GeForce GTX 770 video card
My old machine (RIP) would just shut off during a lengthy UE4 compile. Guess the heatsink compound just dried off. And my previous video card , Radeon HD 5770, would nearly not be enough for UE4 development work.
So new PC, exciting days ahead.