Flickering Smoke/Pyro

[carlo_c]

Hey guys, 

I have got an up-res'd pyro sim which I've copied and transformed multiple times to make a larger smoke plume. When I render it I get this strange flicker/banding issue that you can see below.

Have tried a few things that I found searching on here like lowering opacity limit and larger depth map + higher pixel samples but it still shows up. I have not tried raytraced shadows yet as it is much slower to render on my computer and I am using this project to try out some different techniques, but I'm not even sure if it's the shadows. Just lit with a key and fill area light both casting shadows. It is the first time I have tried to use depth map shadows, so maybe I'm missing a step here.

Haven't got the hip file to hand to post up (can do this evening) but from what I can remember my settings are: 

- Pixel Samples - 5x5
- Opacity limit - 0.7
- Volume quality - 0.4
- Volume/Diffuse limit - 0
- Noise threshold - 0.04
- Min/Max samples 1/6

- Shadow map res - 1024
- Shadow Quality - 3
- Shadow map pixel samples - 3x3

- Pyro shader with basic settings no noise/displacement etc.
- Volume filter - box
- Volume filter width - 1

Have had plenty of luck before rendering volumes with raytraced shadows and no flicker, so any help is much appreciated.

As always thanks for reading