how to make Changing Transparency material???

[Yu]

 
I want to make a transparent case that transparent at the end only with a colored body.
I cant do it with the mapping glass ( even the colored parts are slightly transparent...)

the attached file is the one I tried with Vray :-/

Is it possible to do this with keyshoot>
I am new with it,
hope there is someone to give some advice.

[Despot]

You could probably do it with a label using a .PNG with a gradient that goes from whatever colour you want to almost completely transparent... Just thinking on my feet here, haven't got time to try it

J

[DriesV]

You'd want to use a B/W gradient opacity map for this.
Maybe you can take a look at one of my posts here:

What better way to get the facts straight, than with a KeyShot package? 
The images come straight out of KeyShot. No post work.

As you can see, this approach works very well. No need for extensive editing in Photoshop for quick images.
The trick is to load a grayscale image as an opacity map in the texture slots. A flat grey image will make the material resemble the xray material and give even transparency across the part (degree of transp. controlled by brightness of map), but with control of IOR etc.

KeyShot package file with textures and scene file can be downloaded as zip.

Dries

There's a zip archive attached containing a KeyShot file showing one way of achieving this effect.

Dries

[Yu]

thank you for all of ur help,
I will try both effects , hope there are adaptable result to show .