guys why people rendering so fast but people in interiors rendering over 99999 hours?
Short form, if you just render the people in an empty sphere, you don't have light rays bouncing off of walls, then off of the person, off of another wall, then off the couch, etc.
All of those bounces and the bounce angles have to be computed, and it's often multiple bounces for each light ray. This is one reason I like to use HDRIs so much, as they don't have walls, trees, etc. with oodles of additional 'bouncing' points to compute.
There's a bunch of free HDRIs over at
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, if you want some 'simple' HDRIs to stick your characters inside of. He likes donations if you are so inclined, but the HDRIs are free/no registration required.
Load one up in Daz3d. To do so, go to your Render Settings tab, and under the Environment section, find Environment Map and set the image to the HDRI you downloaded and want to try out in your scene. Make sure Environment Mode is set to Dome and Scene.
Set Ground Position to Manual, and Draw Ground to on. Maybe increase the Ground Shadow Intensity if needed. You can mess with Environment Intensity, etc. later as needed. Ground shadow will create the illusion of the character standing on the ground instead of just hovering inside of a sphere. Adjust your camera angles and sphere rotation to taste. Note that you'll have to set your viewport to Iray, with Dome On, to see the HDRI in the background.
Anyways, If you set Draw Dome to On, you'll see your character, etc. with the HDRI you just pointed Daz to all around them, and the HDRI will also light your character, usually quite nicely. You can set Draw Dome to off, and still get the same lighting, but with a transparent background.
I use 4K HDRIs the most, because they are a quick way to simulate having your background slightly out of focus without messing with the camera focus, but you can use the 8K and 16K ones if you want crisper detail in your background. The main thing is that the HDRI also provides lighting, often very compelling lighting. You can put structures (apartments, etc.) inside of an HDRI sphere (say if you want something showing up outside the window) to simulate light pouring in from the outside as well.
Sometimes I'll augment the HDRI lighting with additional placed lighting as well, and if it's an entirely indoor setting I may skip the dome and just set environment to scene. It all comes down to how your scene is set up.
You can also in some cases add a 'ground plane', that is modeled terrain for your characters to stand on, which can make finding a decent camera angle much easier (as the ground is 'attached' to yoru character and not in the 'distant' sphere. Some of the Daz3D products do this for you already, such as Pines Beach
Anyways, you should still learn proper lighting techniques using lights, emissive planes, etc. but HDRI spheres are nice for instant gratification. Well instant in the sense of 'just set and render'.