Hello! I am truing to shatter a window in blender to composite into live action footage. Everything is working except the glass is rendering black at some angles (see attached image). The second attached image is the node setup for the glass material. I am not using an HDR environment map, instead I have photos from the location to use for reflections. I used Import Images as Planes and brought the stills in as Shadeless.
I can't tell if my issue is the Material or a render setting or both. Any help would be appreciated!
It would be helpfull to add a (few) printscreen(s) of your current Blender scene as well, since I fial to understand how your photos are used to create the reflections?
jjonas No lights in the scene and no HDRI, just reflections & transmission.
Hey Chris, like William mentioned it could be due to not enough transparent or transmission bounces in the Light Path settings, but it's also because there's nothing for them to reflect at those angles if the only sources of light are directly in front and behind. Try adding an HDRI and see how it goes.
jjonas They are found in the render panel.
They are in the "Bounces" section of the Light Paths panel.
williamatics OK. I have tweaked every one of those settings. I cranked Transmission & Glossy up and down with no changes. But I will try again,
jjonas I cranked the Bounces for Transmission & Glossy to 100 (much higher than I thought would be necessary) and get this. The venetian blind look stripes are the HDRI. Not sure why it's doing that. This is from HDRI Haven so I know the image is good.
jjonas The stripes are reduced when lowering the IOR in the Fresnel Shader for the material... but then I loose the cool glass look.
