Newbie: Cannot see content of jar after Material Change to Plastic

[ddolezal]

Hello everybody,

I just ran into my first severe problem which I could not solve by searching the forum and reading through the hints and tips posted here.

I have a jar with a lid where the content is simulated by simply mapping a texture of jam around an inside object.
As long as the jar has a glass material, everything is fine (except for the inner reflections of the labels in the glass)

So I decided to change the material of the jar from glass to clear plastic.
As soon as I do this, my content object is no longer visible.
I am at a total loss what happens here.

Can perhaps somebody with a few minutes time please have a look at my files and explain to me what happens in my scene an why it happens?

Thanks a lot in advance for your help,

Dieter

[ddolezal]

File:

[PhilippeV8]

Confirm you have indirect illumination turned on ?

[thomasteger]

I am not sure I understand what the issue is. You have an opacity map mapped to the outside of the jar. What is not working for you?

[Chad Holton]

Hello,

You may just need to play with the plastic values a little more. I attached what I ended up with if you want to check it out. I did scale the filling down a little as it was showing some interference with the jar causing black areas.

Chad

[ddolezal]

Hello,

detailed indirect Illumination is on.

The problem is better illustrated by the two screens:

If I use Glass as a material for the jar, I can see the content (the jam)
If I use clear Plastic as a material for the jar, I cannot see the content anymore - it becomes black.

[Bad Robot]

I had this problem myself. I applied the clear plastic material to a car body and some parts of the object showed the problem.