[b-kandor]

Hi Thomas,

I agree with your 'physics of light summary' and now, even more with the above test - which is ded on.

I have a render I was working on a while ago where I had 1/4" glass shelves 10' long and 16" wide where no matter what I tried the edges looke too dark, very similiar to the edges of the barrels seen above. At the time I had no clue whatsoever about how to adjust the hsv for common glass. Soon I will need to rerender the final of that project and now, armed with all of this new info I will try to make it work.

The glass used in the project is spec'd as 1/4" tempered low-iron glass or 1/2" non-reflective tempered low-iron glass. Most of it is also acid etched and back-painted with various color coatings.

Thanks again for your insight.

Kandor

[Thomas An.]

...Soon I will need to rerender the final of that project and now, armed with all of this new info I will try to make it work...

Hi b,

If you get to do this test I will look forward to see your results. If you run into problems let me know and we will figure it out.

The thing about glass is that when doing photo comparisons we have to be careful and make sure the render closely resembles the environment of the physical specimen ... otherwise the real glass may be picking up light rays from unassuming sources or indirect glows and channel those rays fiber-optically; making its edges have a brighter appearance causing us to think that the render might be wrong ...

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[b-kandor]

I will Thomas, thanks for your interest!

BTW, here is the link showing my previous 'dark edge' phenomena (sp?) which I will be trying to correct.

http://www.maxwellrender.com/forum/view ... reen+glass

[Tim Ellis]

Three combined mxi's, two 8.5hr & 1 17hr render.



Tim.