translucent curtains

[egz]

I did small scene update so now all settings of vray are the same as in tutorial. But still it just dark scene =( If in older versions of vray translucency algorithm worked fine why it was changed?

Probably because it wasn't fast enough, and not correct enough. I believe the update addressed both those issues.

[PATER]

So, i tried it in the meantime...

with glossiness or Thickness set to 1.0 its not possible...
so i tweaked the settings a bit... Glossiness down and Thickness up to 300.

This was the first result... bad looking and long rendertime


To bring down rendering-time i setup photon maps
i set the Intensity of the Spot to 100.000 + inverse square fallof 1.
Anyway... the Photons going through the curtain became awfully white and the rendertime was way to high (the spot is still in the scene so you can see what i mean)

Then i switched to Vray-Light and cranked up the multipler...
I got nice photon solutions...



with rendering times much faster i played with the settings of the materials
i loaded the old vray-flesh material and tweaked it a little
this is what appeared:



So... this is better but still not good like the pic in the Tutorial
Maybe you guys can play with this scene further... more people, more variations. I have to say that the material reacts very strong to little changes - so be carefull!

...here's the scene

[shytigercp]

re

This is the best that I can do. Too much rendering time just for a set of curtains and drapes.

[lukx]

shytigercp can you share settings with us?

[shytigercp]

re

I just now realized that this thread was all about the use of Vraymaterial translucency....the image I posted used Standard materials. Sorry about that.

[lukx]

[shytigercp]

re

Curtain settings
glossiness: .98
refract color: 139,139,139
IOR: .98
Translucent checked
affect shadows checked
Drapes: standard material

2nd image
Drapes: same settings
Translucent not checked

[lukx]

on first the room should be brighter and there should be more white burn on celling and walls......are there going to be some good tutorials or help for vray like for brazil or finalrender. In vray help there is no explanation "what this button do". Just some useless slogans.

[flipside]

Hi lukx,

can you be a bit more positive please?

If you know fr already, the vray manual should help you enough. For some additional topics and explanations, you can find lot's of info on www.vray.info.

I also come from fr and learned almost everything in 1 or two months with the help of the above and this great forum. Can't say the same with fr... Where do you find all this great fr tut's? Never found them I think...

Also, this thread is about curtains, not on how to illuminate a room, so the overall brightness is another tweak easily made.

[lukx]

hi flipside sorry for my pessimism. I remember you from fr forum. And have to admit that I was suprised seeing you here.

[mike_kennedy]

There is a material plug-in called backlight that can replicate some of these sort of effects at scanline speeds.
www.maxplugins.de

[lukx]

I after few hours of tweaking this scene and nothing!!! No one is trying to solve this problem? Why in vray it's so hard to get proper transparency, cause it's all about transparency! I can't get proper thicknes of this curtains so the light will come through and than burn on surface!.

[Yadla]

Here is my small translucent curtains attempt



And HERE u get a small animation test, using our lovely simcloth3 (1.3Mo, sorry, i have trouble encoding with the last divx codecs)


Lighting is skylight only.
Here is the mat used:
(refract subdiv was 15 for animation)

[lukx]

sweet but I still can't get your kind of translucent quality
I 'm guessing that your vray isn't v1.09.03i? Maybe "i" have some problems with this translucency?

[Yadla]

Check ur colors, try with exactly the same.

I use 1.09.03g version... i dont think there is a difference about material.

BTW, its a volume curtain, with a very small thickness, i had opaque result with no volume too !

PS: plz post smaller picts