Pyro noise issue

[Mzigaib]

I am trying to render smoke with pyro but I m having jumpings on the texture noise even with the dual rest turned on I am also using billowy smoke shader, anyone else having this problem?

Obs: Using Houdini 11.1.

Thanks.

Edited September 15, 2011 by Mzigaib

[efx]

Hi,

I am not using H11.1 yet.

And I am wondering are you sure that H11.1's billowy smoke supports dual rest??

~H11.0., it does not so.

Cheers

[Mzigaib]

Hummm, theres no option for dual rest, how could i make this work inside the shader?

Thanks for the feedback.

[lukeiamyourfather]

Hummm, theres no option for dual rest, how could i make this work inside the shader?

Thanks for the feedback.

Use the Pyro shader which supports dual rest fields out of the box. The dual rest functionality can be ported to other shaders and renderers but why reinvent the wheel? If you decide to add the functionality essentially the shader should always be looking at the field that isn't resetting and fade back and forth between them as the reset alternates.

[Mzigaib]

Use the Pyro shader which supports dual rest fields out of the box. The dual rest functionality can be ported to other shaders and renderers but why reinvent the wheel? If you decide to add the functionality essentially the shader should always be looking at the field that isn't resetting and fade back and forth between them as the reset alternates.

Thanks for the feedback!

I would like to port this for a VOP VEX shader because 1st I would like to learn 2nd I still not good with code so using vop shop is easier to me, I didn't test it yet but can you tell me if i can get the same results with the pyro shader comparing to billowy smoke shader?

Thanks.

Edited September 15, 2011 by Mzigaib

[efx]

if you want to make custom billowy smoke,

you can use inline code inside If Do noise and write like below,

float drw = ($frame-$start)%$rate;

float bw;

drw = smooth(0,$rate*0.5,drw) - smooth($rate*0.5,$rate,drw);

bw = lerp($noise2,$noise,drw);

$out = bw;

$frame is current frame ($FF)

$start is start frame

$rate is reset every frame

you can also see code from pyro shader and you can find very similar code.

or you can build without inline code like this pic

chaos1 connected to noise1 with rest1

chaos2 connected to noise2 with rest2

Hope this helps

Cheers

[Mzigaib]

Thank you very much, I'll try it soon as I can but I get your explanation realy helpful.

I'll let you soons as I tzry it.

Cheers!