IRay renders all assets in the scene?

me_77577

Hi Daz friends, I was wondering if IRay renders all assets in the scene, or just what is seen in the camera or perspective window?
I hav notished that when I remove all assets not in the view range the Iray renders ten times faster. Does anyone now this for a fact if it does or not.

Kind regards

GeeBee

brvsn

I'm not expert but I think stuff you don't see in the rendered scene because of the camera, still needs to be considered in the rendering process, because there could be reflective materialls, lights and so on

Richard Haseltine

ltbrvsn said:

I'm not expert but I think stuff you don't see in the rendered scene because of the camera, still needs to be considered in the rendering process, because there could be reflective materialls, lights and so on

Yes.

magog_a4eb71ab

Anything that is not within view of the camera should be removed or at least "hidden" unless it is something necessary that contributes to the part of the scene that is going to be rendered(i.e. something(s) that you want to appear in reflective surfaces, off-camera primitive lights for a color effect, etc.). If you have an enclosed room where, for example, you can only see the floor and 1-2 walls, you'll want to hide the ceiling and any other walls that will not be in the render. Same thing with characters. If you're just doing a portrait headshot of the figure, depending on whether or not the character's full shadow is going to appear in the render, you could remove the textures or hide the parts of the character that will not appear in the render. The less light has to bounce around(a LOT for enclosed rooms), the less geometry, the less textures, and the less number of lights you have in the scene will all help to reduce render time.

Otherwise, ANYTHING you place in the scene having geometry, textures, and/or produces light that is not hidden, regardless of its position in relation to the camera, will be loaded and included in the rendering process.

Richard Haseltine

Unless all surfaces are matt I would certainly not suggest hiding unwanted walls as that would be likely to have a noticeable effect on an Iray render. Other elements are a matter of judgement.

magog_a4eb71ab

Richard Haseltine said:

Unless all surfaces are matt I would certainly not suggest hiding unwanted walls as that would be likely to have a noticeable effect on an Iray render. Other elements are a matter of judgement.

That's the caveat. If it doesn't need to be there, I remove it out of necessity since most of my renders end up being done with the cpu. Trying to render enclosed spaces increases my render times quite a bit, and I would imagine it being even moreso with walls that are too reflective in a boxed-in/enclosed scene. I'm hoping a Titan RTX will allow me to render such scenes in a timely fashion because this laptop I'm using is just painfully slow for that kind of stuff.