[Ezz_101]

Thanks for your advice which sounds spot on after further testing.

The logo moves at a medium rate over the landscape background which is of real earth (darkish blues and greens mainly with half ocean visible next to land). It is nopticiable at this speed too much for my liking.

The logo was a bright silver and with light focused directly in parts of the animation it turns to bright white and yes that is when the artifacts start appearing. I also have a explosion like sun flare at the beginning which also casues the distortion.

I tried changing the logo to a dark grey and the effect was still evident but only very minor which would be ok but the amount of darkening to the grey is not acceptable (the logo is not in the right colour now). I also changed the flash flare from bright white to soft grey and green but it still has the same effect (no change).

I also found that while the animation was within the safe title screen areas (just) before at closest zoom i tried making it very small (50% of safe title window) and dark grey which eliminated the problem altogether.

I now am frustrated as while i can lighten the background slightly and darken the silver specular logo slighly and even reduce the size slightly which all help I still have the ripple at just one point for a couple of seconds and any darker or lighter on the objects is beyond the corporate look or real world look this project. Also i have seen many other commercial 3d animations that use similar mixes of colours and strenghts work just fine.

I guess i need to keep playing around and testing the things you have mentioned.