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I have a bright grey plastic single surface with scatter 0.999 and some emitters behind. I try to give a greenish emitter color, but the light through the plastic looks allways white. Is this a known bug?

Hi Micha,

Can you post some screenshots from output?
And I wonder if you have the same problem when it has thickness.

Best regards,
Tom

Hallo Tom,

here the screenshot. The right emitter should be green. The problem stay at higher SL (f.ex. 18) too.

And thickness is not realy an option, because it bring much more noise and rendertime ... and it should be possible that it work (like a cast in film emitter). On this single surface way is it possible to get very clean images in a short time.

A small question more: is anything saved in the mxs file, the textures too? If I send a mxs for a bug report, is all inside.

Greetings Micha

Sorry Micha,

Color emitters behind translucent plastic works as expected as far as I see. There is no bug on this one.
Also, using single membranes is a hack and any unexpected behavior from a "hack" is not necessarily a bug, but please try not to use single membranes (other than emitters) unless you fully understand Maxwell behavior.


In any case, here in my tests this works fine even with single planes.
Try absorption=1 and scatter=0.2.
Also adjust the burn value otherwise the strong light will appear very bright and thus white.

Micha,

Here you can see it works:
All the settings are as you described.


Build your scene physically correct and make sure you're using CUSTOM preset for color emitters.

Best regards,
Tom

Upps ... I find the problem. I have overseen that I have set a texture befor to the lights. So, the color was ignored.

Thank you for very much your help and sorry, it was my mistake.

PS: Tom, if you like, delete the post.

Micha,

Thanks a lot for your reports anyway. Other users could have the same issue; this info is useful for them.

Juan

Micha wrote:PS: Tom, if you like, delete the post.

As Juan mentioned, it'd be better to keep for others to share this experience.