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Hi,
I'm trying to figure out how the Retrace Threshold value works. This is what Spot3D says:
The setting's default value is 1.0 and I presume that it represents a threshold of GI Light cache error before starting to retrace ...?
Does that mean that a value of 0.9 would mean that commencing of retrace will happen when the error is smaller?
Keeping this value at 1.0 resulted in extreme increase in render time and basically made some buckets un-renderable for an interior scene yesterday (V-Ray 2.00.04). We had to actually disable retrace all together for a still image just recently because of it, in order to get the image to client in time for deadline. In theory, would it be more safe to set this value at let's say 0.9?
I'm trying to figure out how the Retrace Threshold value works. This is what Spot3D says:
when enabled, this option improves the precision of the global illumination in cases where the light cache will produce too large an error. This is especially obvious with the Use light cache for glossy rays option, or near corners where light leaks might be possible because of the light cache interpolation. For glossy reflections and refractions, V-Ray dynamically decides whether to use the light cache or not based on the surface glossiness and the distance from it so that the errors due to the light cache are minimized. Note that this options may increase the render time.
Does that mean that a value of 0.9 would mean that commencing of retrace will happen when the error is smaller?
Keeping this value at 1.0 resulted in extreme increase in render time and basically made some buckets un-renderable for an interior scene yesterday (V-Ray 2.00.04). We had to actually disable retrace all together for a still image just recently because of it, in order to get the image to client in time for deadline. In theory, would it be more safe to set this value at let's say 0.9?
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