[Micha]

Hallo,

I don't know it make sense to post bugs, because the current Maxwell is more than one month old. But here the bug:
I have used a diffuse material plane with a sss 0.99 - a emitter plane under the diffuse plane. I place some glass objects and apples on it and get a nice rendering with light from the ground. But, if I add two emitters above the scene as reflection planes and set the intensity very low (also 0 !!!), than all objects show shadows on the diffuse ground and the light from the underground can not kill this shadows. Here a part of the image, no light a the top of the apples, but shadows under the apples.

[tom]

Because, you don't have thickness for your plane.

[Micha]

Tom, this is right, but I think, it should work anyway. Shadows without light, strange thing. I don't have time today to test it in the detail and if you remove so fast the post from the bug section, than I'm not so motivated to discover potential bugs.
And make it sense to discover bugs in the current official Maxwell, it is some weeks old?

Why I can not build an emitter inside a plastic object, like in a LED the emitter is inside a plastic? Also I feel, on this way I get less noise and a faster result.
Are you sure you are involved enough in the developing process to remove this post from the bug section?

[Micha]

... good here an example with a thick and a thin ground plane. The thick ground plane increase the rendertime very strong. So why should I use a thick plane, only, why I get strange shadows if I use extra emitters?

... some minutes later ...

Interesting, I have changed the ground from plastic to diffuse like in my first image and now it works with a thin surface too - no strange shadows. There is a bug, but I don't know where - Rhinoll or Maxwell.

Tom, please, if you are not sure about your answers, please don't move posts. You can see now, your answer was wrong, dosn't help, only bring longer rendertime and less quality. Moving posts give a bad feeling. I don't like to search posts. If you must do it, please give an answer and wait befor you clean the forum 24 hours.

[Thomas An.]

Because, you don't have thickness for your plane.

Tom,

A solid is not needed for SSS. I have done tests about it.
The behavior is similar to dielectric membranes.

[tom]

Are you sure you are involved enough in the developing process to remove this post from the bug section?

Dear Micha,

A "report" should be an exact conclusion to deserve to stay under Bug Reports section. It's strictly NOT my personal intention to move it here. Since your post is NOT deleted anyway, you can keep your bug search here and when it's done you can post the result somewhere else. Please understand that we have to keep Bug Reports section as clean and as simple as possible, otherwise there may be countless challenges.

Best Regards,
Tom

[tom]

Because, you don't have thickness for your plane.

Tom,

A solid is not needed for SSS. I have done tests about it.
The behavior is similar to dielectric membranes.

Thomas,

Practically you're right, however you also know that Maxwell Render is designed to work correctly with true physical conditions including good-normals and closed volumes. Otherwise you may have problems with certain conditions (not always). This problem may not be directly about it and I respect.

Best Regards,
Tom