I have had a number of PM and email conversation with Patel in trying to fix my problems, we have not been able to resolve the issue, Patel gets it more than I do so here is a summary of the things tried and any other suggestions warmly welcomed.
Put the particle system and the spotlight in 2 renderlayers, or by putting the spotlight in an extra Layer and using the Layerbutton in the LampPanel. - did both
glitch is still viewable when pressing A with RGBA on
The textures are just cloud based textures
I think the Halos were not able to handle the doubled animation. Animated Camera on a path. Perhaps using only one , either the path or the keyed animation wouldn’t have made such trouble. - removed path
It was no more visible after the changes, but I only rendered about 100 frames (2000 to 2100)and the glitches just might have moved to another place
If not, it’ be wonderful.
In the moment I’ve isolated it to just one camera with 1 parented halospot .(No constraints, No path) And this reproduces the artifact with the camera animated just upwards very slowly. Nothing else, just a slow move in global Z
My sample has 400 frames and there were only 2 bad ones though.
Not animating the camera and animating the unparented spot alone upwards the z axis gives glitches as well.
I’ve just tried it, because I thought it could be a bug to be tracked.