I’m still trying to finalise my latest animation and it looks like I’m kind of stuck with one of the black dots problems - since I could not find an answer in the forums for this case, here is what happens in my project - please also have a look at the attached jpegs:
(The problem is a bit hard to see on a single frame because of the lighting situation, but it does show in the final animation… Also: the attached sample frame uses the same nodes setup but without going through the blur to make the problem easier to see…)
These dark dots (and in this frame here also a dark line that look like dirt/scratches on celluloid film) appear when:
• Compositing Nodes are used
• Toon edges are on
• the objects that are supposed to have edges are duplicated and placed in the second (of two) layers that only renders the edges
• it might have to do with the camera placed near the centre of a spotlight with halo (a slightly different camera position might produce no dots at all for the same frame!)
• Official blender 2.45 is used
• AO is not on
• The dots seem to appear on the same places when the frame is rendered again (so no randomness)
• They are not the stars reflecting on the ground (I tested this)
• Strange: when the colour of the toon edges is changed to e.g. red the dots remain black (but when toon edges are off the dots are gone…)
The only working “solution” I found so far (also for my other coloured dots problem that has not to do with toon edges but possibly also with the camera placed near of/filming towards the centre of a halo spot) is to fix this frame by frame in the Gimp… This can be done in this case since there are not too many frames where it happens (maybe around 50 or so in a 4 min. animation), but it still is a lot of extra work and it is easy to oversee some of the dots.
Another test I just did: I replaced the objects in the second render layer (those that are used to make the toon edges) with new ones instead of the duplicates and it first seemed to solve the problem - but then I saw that the dots now appear in other places/frames…?!
Any ideas what might be going on here…? Or does it mean back to the Gimp for me and then writing a bug report…?
Does anyone who has been at the blender conference know if the dummy node that the Plumiferos team used to get rid of their black dots problem is somehow available for download…? Their problem seemed different, since it was random, but it still was a black dots problem…