White Fringing

[Infrared digital]

Hi

I am getting a white fringe around the edge of my renders. The images are saved as tifs with the alpha channel saved then removed in photoshop using the Load channel as selection and Add layer mask commands.

Does anyone know how to get rid of this ?

Thanks

N

[joconnell]

Photoshop has a remove white fringe option in the layer menu - it's actually pretty bad for dealing with alphas.

[Infrared digital]

I don't ever use the remove white fringe in photoshop because its pants.

[toby™]

Be sure to render your image in front of a black background, this reduces those white fringes a lot.
Next, try to apply a smooth selection with 1px within PS. Dunno the correct english conversion, but in german version it's called "Weiche Auswahlkante"

hope this helps

[Infrared digital]

I'm certain its something to do with vray.

[Da_elf]

your rendering on a white or light colored background?
my suggestion is to render out using tga and straight as your alpha

[Dynedain]

Render with a black background, make sure to set premultiplied alpha in your save as targa options, then use Jon Seagull's Photoshop TGA to Transparency action: http://www.jonseagull.com/downloads.shtml#tga2psd

[jacksc02]

another photoshop tip is to use - Layers - matting - defringe (then pick your pixel width)

[t3dm]

another photoshop tip is to use - Layers - matting - defringe (then pick your pixel width)

econd that... works well.

[Infrared digital]

It must be a Vray thing because surely when rendering an animation, you don't want to have to defringe every frame if it is being composited ?

[Pixelab]

another photoshop tip is to use - Layers - matting - defringe (then pick your pixel width)

second that... works well.

Works really bad on semi transparent object.

[RErender]

It must be a Vray thing because surely when rendering an animation, you don't want to have to defringe every frame if it is being composited ?

It's not a vray thing, it is a pre-multiply thing, To antialias the edges it needs to blend with something, that something is your background color. Compositing packages handle this by replacing the black (best background color to use) or whatever color you choose with opacity on the fly. Photoshop does the same thing for white or black.