casino dize material ?

[dlparisi]

Some things to consider... Raise your cube off the ground a little bit to get shadow under the cube - it'll look more correct. Also consider chamfering the edges just a bit so the edges get a little highlight. The diamond facets that are part of the cube had the diamond material on them - they should have the red material.

I rebuilt the die with a chamfered box and put diamonds on the back side. Without something to bounce around on the inside it gets a little flat looking. FYI, the material isn't the render time killer it's the hedra (and the vray area light a little). Remove or hide the hedra from the scene and it'll render much quicker due to not having to calculate all of those internal reflections. About a third of the time for me. Still no caustics, I'll leave that to daforce .

[DaForce]

Can you upload that version of the file.

So I can "caustic" it

[dlparisi]

Caustics away... http://www.dpict3d.com/vray/dice_dlparisi_002.rar

[DaForce]

quick test

[bernhard]

thank you

Hello friends and thank you so much for yor help, I really appreciate that.
I've got a summer flu, and I have such a high fever, that I only can lay in the bed at the moment.

Couldn't test anything else, I feel really very bad, sorry for that.

But I've fixed the link for the first scene file, you can download here:
http://www.bernhardrieder.com/ask/dice_fix.rar

I think it's the fastest setup, but I am not sure if it will work reaching the result from the pink dice.....

Thank you so much for your help. Doing very good to know having some friends here wokring together on some issues.... I know you all make better stuff than I do, but when ever you need something, please let me know, maybe I can help you too...

so long, need to go to bed,
thx a lot,
bernhard


@DaForce: yeha, looking much better now your quick test....

@dlparisi: oh yes, thank you so much for your hints, great to know and thank you also so much for your help.....

about the dimaond material, I think I also would need some dispersion, sorry, couldn't find a working solution until yet...

anyway, great forum - great people, can't say that enough.....

[bernhard]

back..

Hello friends and thank you for your patience... I am still a little bit weak, and I think that dice is responsible for.. it's really killing me.. lol:

I've posted you my 3 versions, tried much more tests, but sadly failed in getting a closer result to the reference image.

hmm, I think DaForce last image is the best, but I am not really sure about the diamonds - I think the dice material and caustic is perfect, only my diamonds look a little bit weired....

what do you think ?

I've also searched for a dispersion solution, but couldn't find one.
I've downloaded the reference file from sven brooke:
http://myweb.tiscali.co.uk/elvis/dispersion.html

I've contacted him, and he told me, that this old dispersion material doesn't work anymore in the new vray version.

Hmmm.... sooo, at the moment, I feel completly defeated...
can't believe.....

bernhard

[DaForce]

Have a look at this
http://www.chaosgroup.com/forum/phpB...ght=dispersion

[Dynedain]

You should probably take a look at your IOR values. It looks to me like you're using an IOR suitable for glass (1.6ish) but your reference image is definitely a plastic. Changing the IOR will give you different results in the caustics, as well as change the SSS results.

[bernhard]

thank you

@DaForce: Thank you for the link... Iwill try this material too on teh weekend... let's see what I can reach, hmmm.. there must be a way...

by the way, would you be so nice and upload for me your last quick test file ? that would be great....


@Dynedain:
Do you mean the diamond material ? or do you mean the dice mat ?
Well, I think the dice material now in the last scene file from DaForce, inlcuding the Caustic looks really damm good... only my diamonds in the file are looking a little bit weired....

But for the diamonds I've used the IOR value from vray info.... hmm, that should be ok...

hmm.....

[DaForce]

http://rapidshare.com/files/51101922...parisi_003.rar

There ya go.

ALso might be worth while setting the dice caustics to the proper plastic IOR as Dynedain mentioned.

[bernhard]

thank you

Thank you DaForce for uploading your last scene file.
I've opened the scene file, and made the dispersion material shown in the other thread.

Here is the result:

well, yes, I named it uff.... I think the image tells everything....

ohh yes, here is the Dispersion.mat: http://www.bernhardrieder.com/ask/DISPERSION.mat

[DaForce]

You messed up the material, quite abit it seems.

You put all the colors into the reflection slot not the refraction slot and your diffuse colors are grey not black which stops it from working.

Im just re-rendering it now.

Seems it doesnt work as expected anyway.. might need some more tweaking.. *shrugs*

[bernhard]

thank you

Thank you DaForce, yes, this little dice is a fraeky challenge, I never thought that... but I know it's often very hard to reach a render from a photo.... well, ok, it doesn't have to be 100%, but so, that it looks really real and nice... and no clue what I do - it never looked very nice...

[DaForce]

Yeah its proving to be very very difficult.

[bernhard]

hmm

Yeah DaForce, really difficult, good to know that I am not alone.. lol:

Well, I was thinking about the render, and one thing is definitive the diamond. I think the polish of the diamond needs to be different, so the model.

That's the first point in the mesh. The inlay for the diamonds makes a difference too, which material is it, and is it a flat surface, or not, etc.

The dispersion in the diamond mat is also an issue, it seems to be that the dispersion fake is not really the one that works for this kind of render.....

Huuaaa, also I was searching for good looking diamond renders made in vray, or general jewelry - but couldn't find some photoreal good looking renders.

Maybe you know someone, or have some links, would be great.
Anyway, thx for all you efforts, I really appreciate that,
bernhard