Another one for the experts!

[Karl Larsen]

Suppose you want to render an exterior scene, and you want to keep the MR Sky environment reflections in your Spanish roof tiles and flatwork (sidewalks, driveways, pavement, etc.), and you want to save the render as a .PNG so you can add, modify, and position a background image and background entourage after rendering, and you DONT want that irritating white halo you get when you save a render to .PNG!

 

How do you do that?

 

I'm pretty sure I read something here about this problem once before but I cannot find the thread.

Edited August 10, 2013 by karlar

[marius e]

hmm, that would be nice.....also irritates the crap out of me.....

[Karl Larsen]

After reading through everything I could find doing Yahoo searches (I stopped using Google, whenever possible, 3-years ago), I used the "Remove White Matte" tool on the .PNG (same tool in Adobe and Corel) and I'd say it killed 85% of that disgusting annoying halo.

 

Now for that last 15%...

[Karl Larsen]

So OK, it's that "blur" thing -- I turned it down to 0.01 on all the leaf textures (I use A&D and I've been using an RGB .jpg for diffuse and B&W .jpg for the cutout) and no filtering and, I'll be darned if after using the "Remove White Matte" and inserting a background image, there is no more halo...

[fixtionnothing]

you can use .tiff + Alpha chanell? and create mask in Photoshop... and use refine mask edge... if need keep MR sky use map Background Switcher.

if you use gamma 2.2 + transparency map (B/W map) load image in linear gamma 1.0...

sorry i not used .PNG...

[Chris MacDonald]

I always turn off filtering on all bitmaps these days. The blur/filtering ruins what is often an otherwise very good texture.

[Corey Beaulieu]

Are you rendering on a black background? If not, try that. Even with the alpha channel you will get a slight halo from the sky.

[blank...]

Are you rendering on a black background? If not, try that.

 

This. Render on black, use Environment/Background switcher.