Please make the Luminance property of the iRay shader set to “on” by default.

lukon100

When I make a surface emissive, the Luminance is set to 1500.00 by default. This is not “on”. This is as good as “off”. This seems like poor interface design.

1. 1500.00 is a totally useless value. It is too dim to effect any render but those in which the camera might be 1 cm from the emissive object and there are no other lights in the scene.

2. 1500.00 is worse than useless because it is deceiving. It gives the false impression, especially to newbies, that 1500.00 is a useful value for a light to be when it is on. It makes newbies wonder whether they’re even using the correct parameter to make a light turn on.

3. 1500.00 is worse than useless because it wastes time. It makes newbies waste time cranking the value up, possibly several times, as they try to find out what value will actually produce some illumination, all the while still wondering whether they’re even using the correct parameter to make a light turn on.

Now that I have some experience, I always just crank up the Luminance to 888888 right away to make a light appear to be on.

But why should I have to do this? Why not make the default value something like 888888?

Richard Haseltine

What are you Tone Mapping values in Render Settings? If you set them up for an indoor shot in artificial light you may find the default value more useful.

FSMCDesigns

You might want to change the wording on your post to change it to my desired setting since that is what you mean. What you fail to realize is that 'your' usage is different from others. What you can do is apply your settings and then save as a material preset for your default use in the future that way you get your personal settings each time you apply that emissive preset to a material zone.

on top of that there are a few emissive light sets in the store that work fairly well.

Ostadan

1500 lumens is a typical 100W incandescent bulb.  I have always supposed this to be the reason for that otherwise arbitrary default.

TDBAGZ

Can always save one as an emissive shader preset done and done, No?

Im usually running off watts, and 888888 would be a blowout. Pro fashion sets are avg 300 watts 10 feet from the model I think. I usually do closer emmissive ghost lights at 15-90 watts at 10,000lm - 100,000lm give or take depending on scene, emission color, environmental light, tone. 

There's a huge varience in settings depending on the endless possibilites you might be using the source illumination for.