Projection/Displacement/Motion blur issues in 6.5

[Sandy Sutherland <sandy(at)blackginger.tv>]

Hi Guys,

We are trying to do some renders here with different techniques to be 
able to use motion blur.  The first one causing problems - see here:

www.fictionfactory.co.za/black.jpg

is a straight textured scene, with displacement using rasterize motion 
blur - notice the black area showing in the motion blur on the rock in 
the middle of frame - circled in red - settings on motion blur - center 
on frame - but we have tried all these settings and none change it - BUT 
we have found a little fix - sort of - if we offset the UVs in the 
texture editor, it renders sort of OK - makes me feel like the order of 
render is wrong i.e. it is sampling displacement before doing the 
texturing and therefore the texture no longer really fits??? 

Next one:

http://www.fictionfactory.co.za/disp.jpg

Is a render which is using the old trick of rendering the pass without 
MB and then reprojecting the render onto the geometry again - in this 
case an AO render, BUT we are still rendering displacement as we need 
the alpha on the edges to be correct - in this case it certainly looks 
like the displacement is happening after the texture projection so is 
picking up the edge of the reprojected texture - which I suppose is 
normal - in this pic:

http://www.fictionfactory.co.za/no_disp.jpg

You can see the same thing, but as this is WITHOUT displacement, you can 
see a slight black edging in the MB - same thing the MB sampling is 
picking up beyond the pre-rendered texture!

Anyone got any ideas for us to try to sort this out??

Thanks

Sandy

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Sandy Sutherland  Digital Doodeller - TD
Blackginger (Cape)  http://www.blackginger.tv
mailto:sandy(at)blackginger.tv
(P) (+27 21) 488 1188  (Cel) 0827893789
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