Smoke opacity once it s cached

[BB_np]

Hi

I ve got a very long cached smoke trail and it needs to be rendered at different angles/cameras. The side and back works fine but hte one traveling forwards I am having issues of looking really thick at the end even tho the trail itself isn't thick.
As this is already cached and I want to avoid recaching, I tried playing around with the opacity ramp but that didn't seem to work.
Do you have any suggestions of how to apply a ramp in the opacity with the beginning of hte trail to be most visible and at the end to fade away?


Thanks
N

[sitnisati]

Hello,

One it's been simulated, you can only affect the opacity along such a long smoke trail in the post.
Not sure of any method you could do with the shader itself.

Best regards,
Kresmir Tkalcec

[BB_np]

Hi

Thanks for the reply! When you say post you mean comping or in FumeFX node?

Thanks

[sitnisati]

Hello,

I meant in comp.
However, if you do have AfterBurn, then the AfterBurn Void Dameon might help.
If the trail is straight, then the Void Daemon can apply opacity falloff along the trail direction.

Regards,
Kresimir Tkalcec