what happens generally if you render a 3Delight scene in Iray?

Drekkan

Was just curious does it actually make render times slower? obviously the scene would not come out in Iray form but would it be any faster or slower than if you were to do a proper 3Delight render for it?

Paintbox

It depends. It would only be faster comparatively if it has less texture maps for instance than a typical iray scene. But I don't think there is any significant speed increase on the whole, since Iray is a different rendering technique. The light calculation + the number of bounces + texture display are simply more complex, so it will take more time, all other variables being the same.

Drip

Daz Studio will automagically try to to interpret the materials and convert them to iray, which takes a bit of time. So, overal, it generally takes a bit longer to render than if you had those materials set up for iray in advance.
Results vary a lot, some surfaces may suddenly turn into emissives, other surfaces may change color or shade (though still have the appropriate main textures assigned). Transparent materials usually loose their transparency. Lights also work totally different in iray, so you may end up with a pitch black render. You have to be very aware of where your lights are placed, whether any light can actually reach your scene, and probably also crank up spotlights a few hundred times.
I believe there are some tools in the store to convert 3delight materials to iray in advance. No conversion is going to be perfect, but they may give much better results than the standard proces.

Richard Haseltine

Drip said:

Daz Studio will automagically try to to interpret the materials and convert them to iray, which takes a bit of time. So, overal, it generally takes a bit longer to render than if you had those materials set up for iray in advance.

If they use one of the standard 3Delight shaders - custom shaders will not be converted.

Drip said:

Results vary a lot, some surfaces may suddenly turn into emissives, other surfaces may change color or shade (though still have the appropriate main textures assigned). Transparent materials usually loose their transparency.

Transparency isn't usually an issue in my experience.

Drip said:

Lights also work totally different in iray, so you may end up with a pitch black render. You have to be very aware of where your lights are placed, whether any light can actually reach your scene, and probably also crank up spotlights a few hundred times.
I believe there are some tools in the store to convert 3delight materials to iray in advance. No conversion is going to be perfect, but they may give much better results than the standard proces.