Why does rendering a scene using a lightcache vrlmap from a pre-made file take twice as long as rendering the lightcache just normally in a frame?

V-Ray for 3ds Max V-Ray for 3ds Max :: Issues
1

Why does rendering a scene using a lightcache vrlmap from a pre-made file take twice as long as rendering the lightcache just normally in a frame?

This seems totally ludicrous.

Vray 6 latest version, Max 2024, Vray GPU.

2

I’m reproducing a very slow loading of .vrlmaps when using CPU, but not GPU. Have you made a typo there?

EDIT: Logged an issue (internal bug-tracker id: VMAX-14691) for the CPU slowdown. Waiting for your answer to see if the GPU issue is something else.

3

I am just using GPU mode, and it’s completely broken. A 6 minute render wants to take 21 minutes when I load a vrlmap.

This is the first time I’ve tried to use this system in over a decade - since GPU existed I think.

In any case, it simply doesn’t work - I don’t think the autosave function is even appending the *.vrlmap extention to the file.

I have been doing lots of render farm rendering and thought I might save some time and money…

Have you made any progress on this?

Also, an update for Vray 6 would be nice, since the feature is broken.

4

Just tested this again and indeed it happens with GPU too. Since GPU .vrlmaps seem to be smaller, the loading time is faster (still not faster than just rendering it), hence the confusion in my previous post.
By the way, when rendering with GPU, make sure you use a .vrlmap generated from V-Ray GPU.

It does when you browse and choose a folder. The auto-save saves it as it’s written in the field, so make sure the .vrlmap extension is there.

It happens in V-Ray 7, too. No movement yet - I’ll talk to the product owner about it.​

5

OK mate, keep me posted