Render times of interiors
What determines the render times of various interiors? (Everything else equal).
Some interiors, like Classic Deco, renders fast, while others, like A Bright Loft, have awful (IMHO) render times. Why is that?
Is it just the number of objects? Or surfaces of the objects? Or something else?
EDIT: This turned out to be untrue. When everything really was equal, the results weren't that different between "Loft" and "Deco".
Will it help to make all objects not in the frame, invisible? (I haven't noticed a great difference when I have tried).
Is there anyway to determine whether an interior will render fast or slow, before you buy it?
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Comments
Actually, with the items you mentioned, often it's none of those things. The Classic Deco set shipped with a shading rate set to 0.001 which is incredibly low and should be much higher. The shading rate determines how much attention each pixel gets to ensure it looks right. At 0.001 it's doing 100 times the work it would do with a shading rate of 1. Setting it to 0.1 should be more than enough to retain excellent quality without killing your render times too much.
Double check the render settings when loading in various sets as they will often bring their own.
Surfaces, lighting and Advanced Render Setting (as noted above by HoF) determine how long a render is no matter if it is an interior or exterior.
Yes geometry not seen will still take resources leaving less for rendering so it does help if you can remove anything not in seen or being reflected from the scene entirely.
As for your last Q, sorry not really. I suppose if the product listed advanced Shaders (surfaces) needed high render setting then I suppose you could say it will take longer.
But I must ask what is a long time for you and what are you computer specs?
@HeraldOfFire
Maybe I missunderstand you, but Classic Deco is the fast one.
When Classic Deco was originally released it had the shading rate set very low, but it was patched in an update. Either way, the point was to check the render settings if you're loading in sets as often they have their own render settings as default which may differ to your own.
Other than that, various shader-based lights will cause extended render times. If the set uses things like UberAreaLight, ensure the samples aren't too high as this will also cause slower renders. In general, most surfaces should render fairly fast in terms of basic geometry as they don't often have any advanced settings beyond a bit of displacement.
The example you gave of the Bright Loft has an incredibly large amount of textures, so it will naturally take a bit longer to render. Check your memory before and during the render to see if that may be the case. If that is the issue, then it might be time for an upgrade. Besides that, it would help if you posted the sort of lighting settings you are using.
@Szark
I was totally unfair to A Bright Loft. It takes about one third longer to generate a pic than Classic Deco but that is nowhere near what I thought inittially.
The major cause of the difference in my rendering times were more complex scenes. My apologies.
Thank you both for your input.
You still haven't posted computer specs or what you consider 'long'...
@mjc and Szark
With WIP, or making a series of renders, or testing things, I consider everything above 10 minutes long. For a single final render, I don't mind if it takes several hours.
I have a decent computer. Here are the specs:
Intel(R) Core(TM) i7-4930K CPU @ 3.40GHz, 3401 Mhz, 6 cores
RAM 12 GB
NVIDIA GeForce GTX 780
We keep asking about how long, because some folks have what I consider unrealistic expectations, but yours are quite realistic. With your machine specs, a mid quality or slightly better 'average' scene without a lot of 'frills' shouldn't take all that long and 10 minutes for a 'not final render' preview isn't an unreasonable expectation.
Spot render and render profiles are your friends there...
You can set up several 'quality' levels as render profiles and do relatively quick preview renders, by adjusting things like Raytrace depth, Shading rate and even (as long as proportions are kept) render size and saving them as render profiles.
Ok cool specs so no problem there.
As for WIP's and tests you could try turning on Progressive rendering (Advanced Render Settings Pane) or decrease the render settings more. Like Shading Rate to 2.00, Max Ray Trace Depth to 0 even for Ray Traced Shadows (for one reflection or one light refracting surface a vale of 1 is required and so on).
Render size will also effect render times so making it smaller will help to.
As for finals even with a Quad Core 3770 3.40 with 8 GB Ram my renders are still in the 4 to 7 hour range but I do use advanced Shaders and lighting most times.
EDIT mjc beat me too it
I strongly suggest the Adamr001's DS4 render settings to ALL. The Draft and Proof quality settings are Ideal for test renders at full size. The settings are in Adamr001's Freepozatory sticky or can be found by link from his tag line.
Yeah, Adamr0001 has done all the hard work of setting them up already...