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Rafal123

Clouds, I3d Artifacts

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Hi people!

I little played today with i3D clouds but I get strange artifacts on the clouds.

First things are 'stairs' on the clouds edge. I emitt these from poly geos, so I thought it becouse of geo. Then I deleted geo but still get this stuff.

Also clouds have many dots, they r very grainy. Does it becouse of shader?

Check it out: http://www.rafal.stnet.pl/rafal_cloud_test1.jpg

r|m

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First things are 'stairs' on the clouds edge.

23948[/snapback]

for this problem you might try truning down/off the compression in your 3d texture ROP.

This usually clears up this problem.

All the best

Luca

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Also clouds have many dots, they r very grainy. Does it becouse of shader?

23948[/snapback]

I'm guessing that you're using adaptive step in you fog shader, I would turn this off.

Is seem to remember adaptive step giving me nothing but problems.

Luca

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I'm guessing that you're using adaptive step in you fog shader, I would turn this off.

Is seem to remember adaptive step giving me nothing but problems.

Luca

23968[/snapback]

Yeah, it will be slower to render in some scenarios but you will get uniform quality at least.

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so... I played with clouds little more and get better result, but I get new artifacts -- horizontal lines on cloud,

check this link:

http://www.rafal.stnet.pl/houdini_cloud.jpg

does anybody know why?

24440[/snapback]

my first guess is the resolution of ur i3d, i think its too low :blink:

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so... I played with clouds little more and get better result, but I get new artifacts -- horizontal lines on cloud,

24440[/snapback]

I have to go with aracid on this one try increasing the resolution.

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how long does it take this render/i3d generation on your machine?

Making a nice clouds is not a problem, making them fast... this is a chalange!

;)

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Making a nice clouds is not a problem, making them fast... this is a chalange!

;)

24513[/snapback]

Hmm.... making nice (as in photoreal) volumetric clouds is not exactly a walk in the park... even if you restrict yourself to forward scattering only. At least in my experience.

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how long does it take this render/i3d generation on your machine?

Making a nice clouds is not a problem, making them fast... this is a chalange!

;)

24513[/snapback]

I'm not sure.... few minutes I think...

are there any option to show render times in Mplay??

and my machine is old and slooow --> Celeron 1.7ghz + old Nvidia

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If I would like to have an animated clouds the one and only way is to animate and render to .i3d right? If I have one 'static' .i3d file and put it on animated metaballs I won't get animated clouds, right?

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nice ... i was also testing some clouds last week... well.. i should say smokes... cause i was trying to get a face.. smoked and dusted ... lemme exaplain with my engrish :)

a face.. which falls down like it becomes powder .. dust.. or like the mummy to make an example.. and i wanted also to fill all this with a sort of smoke.. and i tried I3d..

I'd like to see some cool examples on this topic actually.. maybe Jason can show up something to "trick" or improve quality and render times?

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nice ... i was also testing some clouds last week... well.. i should say smokes... cause i was trying to get a face.. smoked and dusted ... lemme exaplain with my engrish :)

a face.. which falls down like it becomes powder .. dust.. or like the mummy to make an example.. and i wanted also to fill all this with a sort of smoke.. and i tried I3d..

I'd like to see some cool examples on this topic actually.. maybe Jason can show up something to "trick" or improve quality and render times?

25054[/snapback]

cool clouds,

is there any way to get nice dense clouds with hard shadows? like volcanic smoke?

it seems you can't with the deflaut shaders.

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is there any way to get nice dense clouds with hard shadows? like volcanic smoke?

I think yes,

tweaking, tweaking U must Brandon

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