On 22-6-2016 12:28, aradan.d wrote:
> global_settings {
>       max_trace_level 30
>       assumed_gamma 1.5
>       radiosity { Rad_Settings( Radiosity_Fast, on, on ) }
>       photons { spacing 0.005 }
>       }

Most probably the splotchiness come from the radiosity settings. You 
should try at least these parameters:

error_bound 1.0 //start here and decrease slowly until splotchiness 
disappears
nearest_count 10 //or higher, up to 20
recursion_limit 2 //should be fine for this

You can increase count substantially without problems. If you use the 
Rad_Settings, set the two on's to off as you have no normals (have you?) 
nor media to take care of.

A smaller pretrace_end is also to be recommended: 0.01 or 0.005 for 
instance.

Take out the photons altogether.

The preset values are fine but generally you get better results with 
your own settings, adapted to your particular scene.

-- 
Thomas

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