I want to use BF + LC to render an animation with moving objects and moving camera. The Light Cache is set to Fly-through mode, Use camera path is active, Output range is set to Active Time Segment, (450 frames).
During Light Cache calculation phase I should see all the 450 frames “blended together”, however, from the “blended” LC image I can tell that the first ~50 frames are displayed. The final output also came out wrong so it probably only calculated for this first 50 frames. For the rest of the ~400 frames the lights were not proper on the geometry.
I use VRay Next (CPU based).
You don’t need the Fly-through option for BF+LC. Use the default and turn the subdivs to 3000 and retrace to 8 in the lightchache options. No need to precalc everything.
Edit:
Might be interesting:
2 questions regarding your suggestion:
- Won’t that calculate LC for every frame separately though? This might slow down the rendering process in some way?
- Correct me if I’m wrong, but Fly-through’s purpose is to calculate it all in once, so this way, the noise coming from LC means no problem. If I calculate it separately on all frames, some noise, flickering might come up in the indirect lights, or not? (I’m telling this from experience).
However, my question remains, what might cause the flythrough LC not being calculated for the whole range?
Nope, if you set this to 3000 and retrace 8 there will be no flickering coming from the GI. Trust me, I use it on a daily base.
Yea you’ll calculate the LC on every frame but LC won’t take long.
I think I read somewhere that the fly-through mode isn’t good for scenes with moving objects anyway but don’t quote me on that.
You’ll get the advantage of being able to rerender single frames or parts of the animation without the need to recalculate the Fly-through LC file.
For the Initial question:I think I read that there’s a bug with LC in Fly-through mode. There are some threads about that, you’ll find them when you search.
The problem might be related somehow to the model, I guess. I already tried IRrmap+LC before for this same animation, but I also had some problems. Calculating the GI went OK, but in the Final Rendering phase, VRay couldn’t load the IRrmap files data, the final render only used the first frame of the Irradiance map. I might look into the model, and find out what causes this bug…
