Thank you Jan.
This is exactly what I needed. I remember seeing this list years ago, but did not know where it was found.

Best regards,
Brandon

Jan Schmitz wrote:
Hi Brandon,

For an index of refraction of 1.6 you must set an optical thickness of 0.375 for the shader. (-> just add an constant object, set its output to "surface: optical thickness" and set the value to 0.375)

You can find more information about refraction and optical thickness on this page: http://realsoft.info/modules.php?op=modload&name=News&file=article&sid=19 <http://realsoft.info/modules.php?op=modload&name=News&file=article&sid=19>

There is a useful table for other materials on the bottom of the page.

Jan


2009/2/2 Brandon Moon <rsl...@silvergravity.com <mailto:rsl...@silvergravity.com>>

    Hello all,

    Sorry I have not had time to post much in the last few years, but
    I try to follow most of the RS related topics.

    Now for business...  I need some help/advice:

    Here at work we are trying to make a medical part which will also
    act as a light guide (light pipe) for LED lights (4) in a circular
    array.  The material is clear polycarbonate, which I know to have
    an index of refraction of 1.6.  I am unclear on setting the index
    of refraction in VSL materials.  If I create a v3 material, I can
    set the index directly, but the material is obviously less than ideal.

    Can anyone (Vesa?) give me some advise or a material that will do
    the job?

    We have made various CNC machined models, but we though we might
    be able to simulate the light with RS as we refine the design, and
    save some time and money from constant physical machining.

    Thank you in advance for any help!

    regards,
    Brandon


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