Vray Error

[bernhard]

Hello,

- I create a basic vraymaterial.
- In the refraction slot, I create a FallOff map
- For both colors I choose white
- I go to the Output Options, and increase the ouput amount to let's say 10

result:
it doesn't matter if you change the output anymore, it doesn't show up, doesn't react.

so what's going on ?

thx,

[dlparisi]

Well if both colors are white in the falloff map the object will be completely transparent, same as if the refract color was just set to pure white. Am I missing something?

[bernhard]

thx for reply..

well if both colors are pure white, you just do have full refraction.. which means full transparency.. yep.
I just used the Falloff map to get the output amount.. but you also could do it with just an ouput map...
once the output map is in the refraction slot, you could increase the amount of it, and yes, you should get a brighter refraction.

the thing is, it worked in the old vray version.
but since I started working with the new one, this doesn't work anymore...

so is this a bug ?
or is this just different ?
and if so, how can I increase my refraction value ?

thx for every little help,
bernhard

[vlado]

The VRayMtl material will clip its input textures to the black-white range; this is because, in addition to being physically impossible, it could lead to artifacts in the rendering.

You can disable the clipping if you set the "option_clampTextures" property of the material to "false" through MaxScript, e.g.

$.material.option_clampTextures=false

which will do it for the material of the currently selected object.

Best regards,
Vlado

[dlparisi]

I don't remember it working this way. You want to make the refraction brighter? Anyone else got any ideas?

[bernhard]

thx again for the reply.. well, yes it would be physically wrong, but I liked that possibility.

just one thing, I have no clue how I can connect that little script with my material..
can you give me a little guide how that will work ?
I mean, what do I have to do with the script so I can use it for one of my materials ?

thx a lot,
bernhard

[instinct]

Just take the line vlado posted and paste it to the listener window. Then add an object's name between the "$" and the ".material..." for example:

$Box01.material.option_clampTextures=false

Box01 ofcourse needs to have the material assigned.

Regards,
Thorsten

[bernhard]

hmm..

well, I couldn't get that littel script working...
I get the error that it's not capable of to finde the material...

uuahh, it would be top on my list to make that feature back..
even if it's physical correct and even if it could cause render artefacts....

so top row on my wishlist:
make that feature workign again... at least, a checkbox would be great.

thx,
bernhard

[bernhard]

How do i run that script?

How do i run the script above? From instinct-

[RErender]

highlight (in the browser) and drag this script to a toolbar in max, it will make a button, then just select one object with the material you want to affect applied to it and press the new button you created.

$.material.option_clampTextures=false