Slime wrote:
> How come radiosity pretrace replaces mosaic preview?
> 
> They work differently, they have different purposes, and the former has side
> effects which may be undesired (especially when using load_file).
> 

First of all the mosaic preview is always an addition - the colors 
calculated during it will not be used in the image (why should be fairly 
easy to understand).

Now the radiosity pretrace actually abuses the mosaic preview code for 
its own purpose.  This is not so bad since it fits this purpose quite 
well.  It would not be difficult to run both a radiosity pretrace and a 
mosaic preview but what for?  It would just take additional time.  Also 
note turning off the radiosity pretrace while having the mosaic preview 
will not really have the effect of no pretrace - radiosity samples would 
still be taken, just not with the special settings usually used during 
pretrace.

> 
> (By the way, while I'm talking about separating the two, it would really be
> nice if there were a way to turn the radiosity pretrace step off *entirely*,
> to avoid sending any extra samples at all and only use loaded data.)

Just set pretrace_start and pretrace_end to 1.

Christoph

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