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Rafal 'Raf256' Maj nous apporta ses lumieres ainsi en ce 19/07/2004
16:47... :
>I have problem with "Too many nested refracting objects."
>
>after changine an L-system plant (my underwater plant CSS-3 entry) into an
>media instead off plain pigment{...} solid object.
>
>
> Remove bounds........On
>
>
It remove some redundant manual boundings, mainly when the auto-bounding
hapens to be tighter. It may increase render time.
> Split unions.........Off
>
> (btw - what exacly does this option do, maybe it can help? or increase
>speed of rendering in cost off bigger memory usage for more bounding
>boxes?)
>
>
It break up unions to get beter bounding. This leads to faster render
time as it can greatly reduce the number of intersection tests. If you
have 2 or 3 long and narrow perpendicular cylinders in an union, if OFF,
you have to test in the bounds of the whole, almost empty large bounding
box instead of just in 3 narow boxes.
> Bounding boxes.......On Bounding threshold: 3
> Light Buffer.........On
> Vista Buffer.........On Draw Vista Buffer....Off
>
>Scene Statistics
> Finite objects: 217742
> Infinite objects: 1
> Light sources: 1
> Total: 217744
>
>Rendering Error: Too many nested refracting objects. (<<<<<<<<<<<<)
>
> Total Time: 0 hours 1 minutes 39 seconds (99 seconds)
>
>
>How can I get rid of this problem?
>
>Main object, after unrolling recurency is something like
>
>union {
> union {
> union { cylinder{} cylinder{} cylinder{} }
> union { cylinder{} cylinder{} cylinder{} }
> union { cylinder{} cylinder{} cylinder{} }
> }
> ...
>
>_Each_ cylinder have own texture settings (different colors)
>like :
>
> pigment { rgbf 1 }
> interior { media { emission <..,..,..> } }
>
>
>
>
Are those cylinders coaxials? Like all along the X axis between about
the same coodinates. Do they have an ior value, or do you have an ior
set as a default? Are there many intersecting ones?
Just a gues: try increasing the value for adc_bailout in the
global_settings block.
Alain
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