Specular flickering

[nettomb]

Hi all,

I have done a scene were I use light fog effect and light glow at the background and some red lights with intensity greater than 1 and linear decay on the foreground. The ground has a good deal of reflectivity. The problem is that the red specular reflected on the ground flickers and vanishes in some frames when rendered. The light intensity on a glass shadered object near the red light varies too. Not only this, but some black artifacts flicker on the ground reflection near the lights on the background. That all happens when there is camera movement.
I already tried to change some settings on the antialiasing configuration, but in vain. Does someone knows how to get rid of these artifacts and flickering?

Thanks,

Netto

[helix]

In reply to:
Hi all,

I have done a scene were I use light fog effect and light glow at the background and some red lights with intensity greater than 1 and linear decay on the foreground. The ground has a good deal of reflectivity. The problem is that the red specular reflected on the ground flickers and vanishes in some frames when rendered. The light intensity on a glass shadered object near the red light varies too. Not only this, but some black artifacts flicker on the ground reflection near the lights on the background. That all happens when there is camera movement.
I already tried to change some settings on the antialiasing configuration, but in vain. Does someone knows how to get rid of these artifacts and flickering?

Thanks,

Netto

It's all about Magic

[clark]

If you are trying to render Fog,Glows and Reflectivity with an Animated Cam in one go.....the Maya renderer freaks.....my advs is...get rid of the glows (delete it from the Hypershade/Visor too)....and comp the Glows in later with AE or whatever.

[jakobsteffensen]

I had the same problem, I did a search on "flickering, crawling,swimming" etc. All forums, not just rendering.and found a whole heep of info, wrote down a whole page of different solutions from adjusting shading samples, dmap res, filter offsets, etc. so don't know exactly which setting was the solution, but I have no more "flickering". I also decreased the distance between my near far clipping planes,obviously not so much that it clips the render.

[user_deleted]

3 things that help:

1) up the resolution on your D-maps.

2) Move the camera by a fraction - Sometimes if a specular is exactly perpendicular to the camera plane you get a bright flash on just that frame.

3) Play with the clipping planes in the camera or turn off "Auto-Render Clipping plane"

[clark]

i agree with you Icequeen....theres lots of stuff that can be done to bring the flickering down.....but its difficult to get totally rid of it.I had this problem mostly when working with Maya3
As for the glows with an animated cam....i just find that some frames render out without the glows....i tried going back and rendering those frames.....well i tried tons of other things....and finally i just had to delete the glows....and then the craziest thing happend.....my glows were all over the place.....and it was like freekin Saturday night fever in there.....and you know what.....i tried to import the scene minus the glows....no luck....and finally i just had to do the whole thing all over again.....maybe things have improved with Maya4.....but i would rather Comp my glows now.