Matte Translucent bug?

[J the Amateur]

Hi,
Not sure if this is a glitch or a deliberate change in behavior:

As everyone knows, matte translucent materials have an 'energy conserving' mode where the transmission light is whatever remains after the reflection color is taken into account. Before the most recent revision this transmitted light was always white (so long as you didn't manually adjust the color swatch), regardless of what color was in the reflection channel. Now it seems that the transmission is tinted the complimentary color of whatever the reflection color is. For example, I am designing some drapes for a room scene. The drapes are a light tan, which is set in the reflection channel. When I engage 'energy conserving', the transmitted light takes on a slightly blue tone (with the transmission color set to full white). Needless to say this isn't what happens in real life, and it makes the energy conserving mode unusable in many situations.

[J the Ninja]

Hi,
Not sure if this is a glitch or a deliberate change in behavior:

As everyone knows, matte translucent materials have an 'energy conserving' mode where the transmission light is whatever remains after the reflection color is taken into account. Before the most recent revision this transmitted light was always white (so long as you didn't manually adjust the color swatch), regardless of what color was in the reflection channel. Now it seems that the transmission is tinted the complimentary color of whatever the reflection color is. For example, I am designing some drapes for a room scene. The drapes are a light tan, which is set in the reflection channel. When I engage 'energy conserving', the transmitted light takes on a slightly blue tone (with the transmission color set to full white). Needless to say this isn't what happens in real life, and it makes the energy conserving mode unusable in many situations.

Yes, that is what would happen in real life. Your material reflects tan, so the other colors come out the other side. Drapes do not reflect some light than diffuse the rest through without attenuating it. Tint the transmission color tan as well. And mix in null if you want a more shear material.

[Lord Crc]

And mix in null if you want a more shear material.

Just for those who don't know: you can use the "LuxRender Alpha Transparency" sub-panel for this, enable it and set the source to "constant", then play with the transparency value. No need to manually create a mix

[J the Amateur]

Thanks guys. I could swear that it didn't use to do this though....