Transparency Render

[SharkDesign]

using Ray Tracing. 

Any idea why if I render on draft I get perfect transparency

but if I use 'High' I get frosted windows?

Inventor 2020

[johnsonshiue]

Hi James,

The behavior does not look right to me. I need to check with the project team and see if this is a known issue.

Many thanks!

[SharkDesign]

I get the same in Inventor studio as well.
I'm assuming the draft mode doesn't go through all the same rendering
techniques as full quality. Does that mean one of the omitted processes is
light bouncing off the surface which is making it opaque?

It's also annoying that both of these render modes also look completely
different to realistic visual style.

[imajar]

Could you tell what appearance is assigned to the glass pane?  (and have you modified the appearance?)

It would be best if you could share the files - even if you strip everything from the assembly except the glass pane and a  sample object.  Having everything from the lighting settings, environment, etc could help pinpoint the problem.

There are some effects that are not enabled in the draft ray-trace which make it so much faster.  Unfortunately, it does make the the appearance between realistic, draft, low, and high different.  (which I also dislike, but I'll happily take having the draft setting over not having it!).

[LishuangLu · Accepted solution]

@SharkDesign , 

Thanks for asking! This is an as designed behavior, when using Draft mode, ray tracing will simply render less iterations and simulate fake lightings to get better performance. But with High mode, it will render more accurately to simulate the real scene with higher iterations. The problem here is with High mode, the transparency turns frosted one, this is because of the old appearance defintion. To improve this, would you please have a try by adjusting the two settings of your transparency apperance, you can change the Glossiness into a bigger value to reduce the noises, and change the Transluency into a bigger value to make the appearance more transparent. 

Let me know whether it works for you. 

Thanks, 

-Lisa

[SharkDesign · Accepted solution]

Thanks for your help, this seems to have fixed it. I thought a higher glossy value would create more reflections and make it less transparent. 

This worked for me: