Light material color affects the opacity when occlude is off?

[lupaz]

Hi all,

Is this the correct behavior for "color" in Corona light material when "occlude other lights" is off?
I could swear that color was only affecting color and intensity, not opacity, in previous versions.

So, what you're seeing in this image is a gray color for "color". As you can see the sample turns transparent.

[sprayer]

With corona light the same behavior, even more with occlude other lights off it lights brighter

[lupaz]

With corona light the same behavior, even more with occlude other lights off it lights brighter

Not sure I understand. So is this a bug or normal behavior?

[maru]

It's the same in V4 and V5.
I guess the explanation is that if something doesn't occlude light, then it has to let light pass through it = is transparent.

[lupaz]

Thanks Maru.
I see a problem with this: Let's say I have a rectangle and I want it to emit more light in the center than on the sides with a gradient, but still be completely solid (no transparency). At the same time I don't want it to cast shadows.
It used to be easy with a gradient in color and turning "occlude" off. But now I can't.

[maru]

It used to be easy with a gradient in color and turning "occlude" off. But now I can't.

What do you mean by "it used to be easy"? In which version? I just showed that it's the same in Corona 4 and 5.

In what exact situation do you need an object that emits light, is solid, and does not cast shadows?

[lupaz]

What do you mean by "it used to be easy"? In which version? I just showed that it's the same in Corona 4 and 5.

In what exact situation do you need an object that emits light, is solid, and does not cast shadows?

Oh. I thought you meant that it behaves like this since V4, but not before.

In what situation? for example the shade of a lamp. I want it to emit light more on the center and less as it goes to the borders up and down, to mimic the effect of a light bulb being on the center.
At the same time I don't want that shade to cast shadows on the inside of the lamp, nor I'd like it to look transparent where it's not 100% white in color.