1. Is there a limit to the size of a df3 file that can be used with 
"i_dat3d"? A 100^3 file parses ok. A 150^3 file gives the error:

#declare Func={"data_3d_3",<1> library "i_dat3d", 
"pytest.df3",<150,150,150,5>  <----- Error
..\box_erode.pov:62 error: out of memory, cannot allocate -4764052 bytes 
for Lib.

2. All I get when using a df3 with "i_dat3d" is no object or a white box. 
Can somebody show me the function working with spiral.df3 (from the 
standard pov).


Ingo

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