Texture alphas not working in Arnold

[drbrandtjr]

Hi,

I'm using 2D images on cards in my scene.  I've applied textures with alphas to grids.  It looks right in Viewport 2.0 but not in the Arnold render, which puts black in the background instead of cutting out the shape.  I'm using a surface shader.  My textures are png with alpha and pluging it into the out color and out transparency.  What am I doing wrong?

I'm including images or viewport and Arnold renders.

Thanks,

David

[tony.su · Accepted solution]

1. use Arnold shader.

2. turn off the Opaque option under shape node.

https://knowledge.autodesk.com/support/3ds-max/troubleshooting/caas/sfdcarticles/sfdcarticles/Transp...

You can find some video about how to to it.

https://www.youtube.com/watch?v=82Vgd0E3p2w

[drbrandtjr]

Hey Tony, thanks this gets me almost there.  But I need a material that works like a surface shader.  What Arnold shader doesn't need or react to lights?  I can't figure out how to get the Ai standard surface to do this.  I found Ai Flat but it doesn't seem to accept an alpha.

Thanks,

David

[tony.su · Accepted solution]

[mspeer · Accepted solution]

Hi!

With aiStandardSurface use "Emission" instead of "Base Color" to create the color, if you don't want any shading.

[drbrandtjr]

Thanks all, I'm in business!