The second one doesn't have an alpha channel。
Is there any way to turn it off?
Full Version: Texture look like Premultiplied
Are you trying to disable alpha premultiplication in the 3d viewport? I don't think it's possible. 
jsmackThis is the result of rendering.
Are you trying to disable alpha premultiplication in the 3d viewport? I don't think it's possible.
Disabling it in the 3D view doesn't seem to work, or maybe I haven't found the corresponding switch.
I find out that you should unpremult the color you get like this:
And because the inner premult came before color space conversion, so you'd always sample it as linear, then unpremult, and finally convert to your color space like sRGB.
path = r"you/image/path"; vector4 cd = texture(path, v@uv.x, v@uv.y, "srccolorspace", "linear"); // note: always use linear @Cd = cd; @Alpha = cd.a; if(@Alpha > 0){ @Cd /= @Alpha; // unpremult @Cd = pow(@Cd,2.2); // if your color space is srgb, add this }
And because the inner premult came before color space conversion, so you'd always sample it as linear, then unpremult, and finally convert to your color space like sRGB.