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I have a scene which is lit by some VRay lights which utilize the VRaySoftbox texture.
The error occurs when rendering more than one successive frame - so basically an animation.
The first frame of the rendered sequence renders the rectangle light as shown on the left in the attached image (the VRaySoftbox attributes are shown as well). All other frames of the sequence render the rect light as shown in the middle of the image - brighter, with less noise producing more light and reflection in the scene.
Of course this is only visible when rendering the animation and is not obvious throughout look development.
The resulting problem is that if the animation is rendered through a renderfarm every batch of images has the first frame displaying a different light value and reflections then the other frame. So, if each render node gets a batch of like 10 frames, the resulting animation shows a false image every 10th frame, which of course produces visible flickering.
In order to get around this, every 10th frame needs to get re-rendered but not as a single image but as a sequence of two frames because, again, the first frame will have a different light value.
This is especially troublesome of each frame takes about 2 hours to render, so to get one frame fixed I need to render 4 hours (two frames).
Is this a bug or a known problem?
I cannot see any animation feature in the VRaySoftbox. The problem is gone when I deactivate the softbox and it only appears for the first frame to the next, no matter which time frame is rendered.
Thanks.
The error occurs when rendering more than one successive frame - so basically an animation.
The first frame of the rendered sequence renders the rectangle light as shown on the left in the attached image (the VRaySoftbox attributes are shown as well). All other frames of the sequence render the rect light as shown in the middle of the image - brighter, with less noise producing more light and reflection in the scene.
Of course this is only visible when rendering the animation and is not obvious throughout look development.
The resulting problem is that if the animation is rendered through a renderfarm every batch of images has the first frame displaying a different light value and reflections then the other frame. So, if each render node gets a batch of like 10 frames, the resulting animation shows a false image every 10th frame, which of course produces visible flickering.
In order to get around this, every 10th frame needs to get re-rendered but not as a single image but as a sequence of two frames because, again, the first frame will have a different light value.
This is especially troublesome of each frame takes about 2 hours to render, so to get one frame fixed I need to render 4 hours (two frames).
Is this a bug or a known problem?
I cannot see any animation feature in the VRaySoftbox. The problem is gone when I deactivate the softbox and it only appears for the first frame to the next, no matter which time frame is rendered.
Thanks.
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