So Slow

I’m working on an interior and I will tell you what, 9hrs is the fastest time I can get. IRR + LC doesn’t work (light issues) so I’m using BF + LC. I don’t even have furniture in yet. The scene isn’t anything special. I just finished a 4k exterior with displacement, grass, and trees in 2 hrs. I’ll post the scene, but it’s 900MB, if anyone is interested in looking at it.

I’d take a peek if I have time at home

I rendered with a material override, carpet displacement on/off, turned off/on lights, and render times are still high. Currently, I swapped out all lights for simple plane lights, but still 8+ hours. I am stumped!

Bobby, can you save a max 14 version of the scene file and upload it on it’s own?

pff.. 9 hrs. im doing a swimming pool interior.. its been going for 20 hrs on 17 dual xeons and its only 80% done.

ive done almost everything i can think of to speed it up (including sending it to chaos)

i dream of a 9 hr rendertime.

There didn’t seem to be anything out of the ordinary in your file; just lots of calculations to wade through…

Best regards,
Vlado

yep.. i was glad i didnt seem to have made any schoolboy errors.. ive had to add lots more detail since then, so its even slower than when you saw it.

Bobby, thanks for the scene, looking into it now.

Best regards,
Vlado

Here, is the 2014 version Adobe Acrobat

Thank you![quote=“vlado, username:vlado”]
Bobby, thanks for the scene, looking into it now.

Best regards,
Vlado
[/quote]

Having just looked at the scene briefly, to start with I would switch the mesh lights for vray disc lights.
And maybe up the samples on all the lights and reflections. Looks like the AA is working far to hard on this scene.

I will try take a better look at the scene and let you know if I would do any thing more.

I changed the mesh lights to simple plane lights, which didn’t make a difference. Also, I played with samples on lights and reflections, but that didn’t help, either. Since I can’t use IRR because it’s broken, I am wondering if something eternally isn’t screwed up.

To fix your IR problem, in you 2 sided mat Just desaturate the Translucency map. So it cant be an instance of the base materials map.

Worked, now I can use IRR + LC to speed things up.

Now, we are talking! It should be done in 45 minutes, baby!

Huh interesting. Then it means there is a bug with colored translucency.

In any case, the displacement on the carpet also causes a big slowdown. You can try the following to speed it up:

*) Turn on the “static geometry” in the VRayDisplacementMod modifier;
*) Set the edge length to 8 to reduce the tessellation and memory requirements a bit;
*) If you can use a bitmap rather than a procedural texture for displacement, it would be even faster.

It should give it a few more percent speed up even, but it will take extra RAM.

Best regards,
Vlado

Yep, definitely your best bet. I presume it’s the blue / orange thing that you’re getting on the light fittings white you’re seeing as the error? If that’s the only problem then I’m looking at about 45 minutes for a decent render at hd res in about 45 minutes. Pretty much the entire scene is being lit by your indirect light so brute force is going to have to work hard. First thing I did was raise MSR to 128. Next I’d probably look at adding some light selects to see white of the sets of light fittings are the dirtiest. There’s a bit of grain in the wall reflections but it might be okay?

The sun and the mesh lights are noisiest. The sun falls at a very oblique angle touching just a very small portion of the room, but it bounces almost everywhere.

Best regards,
Vlado

What is “MSR”? Material, Sun, and Reflection?

I ended up replacing the meshes. I put the sun there so things didn’t get over exposed from the windows. I’ll try moving it around.[quote=“vlado, username:vlado”]
The sun and the mesh lights are noisiest. The sun falls at a very oblique angle touching just a very small portion of the room, but it bounces almost everywhere.

Best regards,
Vlado
[/quote]