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I'm not sure if this is a bug or not but it seems like this used to work differently (at least in prior versions from what I can remember). If I have a typical 2 sided material set up and the front material has any refraction (i.e, not 0,0,0), I get odd reflections showing up on the surfaces (the front material has NO reflections). If I check "thin-walled" everything works pretty much as expected though. Since it's easy to just check the "thin-walled" option for new materials, my main concern is for older scenes that I render or merge into newer ones. See the examples below:
The scene is pretty simple with just a couple of shapes. You can see in the first image how the reflections appear and are absent when thin wall is ON. I did a another test where the front materials is pulled out so it's just a standard material, still with think walled off, and it renders fine. Scene attached as well, 2Sided Test.zip . BTW this is on 6.1.
Was it always like this and I just missed it? If it's not a bug and has to render like this could the log send a warning if it sees refraction inside a 2Sided mtl without thin-walled checked?
Thanks,
The scene is pretty simple with just a couple of shapes. You can see in the first image how the reflections appear and are absent when thin wall is ON. I did a another test where the front materials is pulled out so it's just a standard material, still with think walled off, and it renders fine. Scene attached as well, 2Sided Test.zip . BTW this is on 6.1.
Was it always like this and I just missed it? If it's not a bug and has to render like this could the log send a warning if it sees refraction inside a 2Sided mtl without thin-walled checked?
Thanks,
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