Maya 2017/Arnold - how do I prevent reflections onto the back of a transparent object?

j00jitsu

So I modeled a watch, and I'm fairly new to Arnold. I've set up my shaders and so far it's turned out pretty well, except that the guts of the watch (hands, gears, etc) are reflecting back up onto the crystal. The result looks very strange and unrealistic, and I didn't have this problem with mental ray in Maya 2016.5. Any suggestions?

solidsupp

Try disabling Enable Internal Reflections in the Standard shader. As long as you have a recent Arnold, that will disable internal reflections both for mirror reflections and specular reflections.

j00jitsu

Here's the settings I've got; I guess I should've mentioned I had tried that already. In fact, the same goes for all the relevant shaders, and the reflectivity property of the shaders have a weight of zero. Maybe if I tried some kind of map for the specularity?

2bytes

Turn off double sided in the Render Stats of the shape node of the glass.

j00jitsu

Awesome! I think that was one of the problems. At first it didn't seem to do anything, but then I realized that the normals were reversed as well. Oops! Now if anyone has tips for getting rid of all the "noise" that would help!