Try a slight x or z axis offset yet?
That might do it.
'location <0.01,5,0.01>' and maybe even a 'look_at <0.01,0,0.01>'.

Message <362248CE.480E8650@imerir.asso.fr>, gemelli david  typed...
>
>When I try rendering the scene below using slow.ini, there's a CW error.
>
>When the upper border of the heightfield is reached, POV crashes.
>
>I tried a lot of things but I didn't manage to correct it. Could someone
>
>explain me what's wrong or what I have to do to render my scene
>correctly ?
>(now, I put the camera lower so the border is out of the view)
>
>@mail:
>gem### [at] imerirassofr
>
>    Thanks.
>
>// the scene
>#include "colors.inc"
>
>#declare Camera_M =
>camera {
>     orthographic
>
>     location <0,5,0>
>     sky <0,0,1>
>     direction <0,-1,0>
>
>     up <0,0,.5>
>     right <.5,0,0>
>}
>
>camera {
>     Camera_M
>     translate <.25,0,1.80>        // when <.25,0,1.25> no error
>}
>
>light_source {
>     <-10,10,-10>
>     color White
>}
>
>#declare Paysage =
>height_field {
>     gif "ground.hgt"
>     smooth
>     texture {
>          pigment {
>               image_map{
>                    gif "ground.map"
>                    interpolate 2
>               }
>          }
>          finish {
>               ambient 0.3
>               crand 0.2
>          }
>          rotate x*90
>     }
>     scale<2,.1,2>
>}
>
>object {Paysage}
>// end of the scene
>
>// the CW.ERR file (useful ??)
>
>CauseWay DOS Extender v3.34 Copyright 1992-97 Michael Devore.
>All rights reserved.
>
>Exception: 0E, Error code: 0004
>
>EAX=00000000 EBX=00512508 ECX=00650670 EDX=4E718F08 ESI=00000000
>EDI=004F4128 EBP=00512384 ESP=00512250 EIP=0044B2D6 EFL=00013244
>
>CS=01A7-FFBCB000 DS=01AF-FFBCB000 ES=01AF-FFBCB000
>FS=0000-xxxxxxxx GS=01B7-xxxxxxxx SS=01AF-FFBCB000
>
>CR0=00000000 CR2=00000000 CR3=00000000 TR=0000
>
>Info flags=00008026
>
>Program Linear Load Address: 00435000
>
>CS:EIP > 66 8B 04 72 DD 1C 24 89 84 24 30 01 00 00 31 C0
>         DD 04 24 66 8B 44 72 02 DB 84 24 30 01 00 00 89
>         84 24 30 01 00 00 DD 5C 24 08 DB 84 24 30 01 00
>         00 DD 5C 24 20 DC 5C 24 08 DF E0 9E 0F 83 27 0A
>         00 00 8B 04 24 89 44 24 10 8B 44 24 04 89 44 24
>         14 8B 44 24 08 89 84 24 A0 00 00 00 8B 44 24 0C
>         89 84 24 A4 00 00 00 DD 44 24 30 DC 5C 24 20 DF
>         E0 9E 0F 83 14 0A 00 00 8B 44 24 30 89 44 24 18
>         8B 44 24 34 89 44 24 1C DD 44 24 18 DC 5C 24 10
>         DF E0 9E 0F 83 18 0A 00 00 DD 44 24 30 DC 5C 24
>         20 DF E0 9E 0F 83 F3 09 00 00 8B 44 24 30 89 84
>         24 A8 00 00 00 8B 44 24 34 89 84 24 AC 00 00 00
>         8B 84 24 A8 00 00 00 89 84 24 B0 00 00 00 8B 84
>         24 AC 00 00 00 89 84 24 B4 00 00 00 8B 84 24 B0
>         00 00 00 89 44 24 48 8B 84 24 B4 00 00 00 DD 44
>         24 30 89 44 24 4C DC 5C 24 20 DF E0 9E 0F 86 C2
>
>
>SS:ESP > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>         00 00 00 00 00 00 00 00 00 00 00 00 00 00 F0 3F
>         C8 9B 52 00 48 9C 52 00 D8 23 51 00 00 00 00 00
>         00 00 00 00 00 80 C1 40 80 00 00 00 B8 23 51 00
>         00 00 00 00 00 00 00 00 00 00 00 00 AF 01 52 00
>         00 00 00 00 D0 22 51 00 A4 81 4B 00 66 00 00 00
>         B1 72 4C 00 93 E3 4E 00 0C 23 51 00 00 00 00 00
>         03 00 00 00 CD 81 4B 00 A4 81 4B 00 F2 81 4B 00
>         A4 81 4B 00 CD 81 4B 00 58 47 4F 00 FD FF FF FF
>         23 00 00 00 F8 24 51 00 90 25 51 00 D0 45 4F 00
>         00 00 00 00 90 25 51 00 D0 45 4F 00 1F 00 00 00
>         00 00 00 00 00 00 00 00 03 00 00 00 FF FF FF FF
>         00 00 00 00 3E 00 00 00 FF FF FF FF B3 A2 49 00
>         F8 24 51 00 03 00 00 00 00 00 00 00 FF 01 00 00
>         01 00 00 00 70 00 00 00 7C 23 51 00 50 E1 53 00
>         D0 45 4F 00 13 00 00 00 00 00 00 00 00 00 24 40
>
>
>         00 80 C1 40 80 00 00 00 B8 23 51 00 00 00 00 00
>         00 00 00 00 00 00 00 00 AF 01 52 00 00 00 00 00
>         D0 22 51 00 A4 81 4B 00 66 00 00 00 B1 72 4C 00
>         93 E3 4E 00 0C 23 51 00 00 00 00 00 03 00 00 00
>         CD 81 4B 00 A4 81 4B 00 F2 81 4B 00 A4 81 4B 00
>         CD 81 4B 00 58 47 4F 00 FD FF FF FF 23 00 00 00
>         F8 24 51 00 90 25 51 00 D0 45 4F 00 00 00 00 00
>         90 25 51 00 D0 45 4F 00 1F 00 00 00 00 00 00 00
>         00 00 00 00 03 00 00 00 FF FF FF FF 00 00 00 00
>         3E 00 00 00 FF FF FF FF B3 A2 49 00 F8 24 51 00
>         03 00 00 00 00 00 00 00 FF 01 00 00 01 00 00 00
>         70 00 00 00 7C 23 51 00 50 E1 53 00 D0 45 4F 00
>         13 00 00 00 00 00 00 00 00 00 24 40 00 00 DA CC
>         CC FF 23 C0 00 00 00 00 00 00 24 40 00 00 00 00
>         00 00 24 40 00 00 DA CC CC FF 23 C0 00 00 00 00
>         00 00 28 40 00 00 00 00 68 9C 52 00 00 1E 00 00
>SS:EBP > 62 24 51 00 28 41 4F 00 68 9C 52 00 8F E1 44 00
>         00 00 00 00 00 00 00 00 00 27 31 08 00 80 ED 40
>         98 24 51 00 4C E1 53 00 01 00 00 00 40 24 51 00
>         A0 24 51 00 A0 24 51 00 A0 24 51 00 B0 21 51 00
>         B0 21 51 00 00 00 00 20 5F A0 12 42 04 00 00 00
>         00 00 00 00 00 00 00 00 00 27 31 08 00 80 ED 40
>         00 00 00 00 00 00 00 00 04 00 00 00 20 26 51 00
>         30 E4 4D 00 7D D0 B3 99 00 00 00 00 00 00 00 00
>         00 00 00 00 00 00 00 00 99 A1 13 40 00 00 00 00
>         00 00 00 00 00 00 00 00 00 00 00 00 00 00 24 C1
>         7F 1F EA 3F 7F 12 EA 3F 00 00 00 00 00 00 00 00
>         AA AA EA 3F 00 00 00 20 5F A0 12 42 00 00 00 00
>         00 00 F0 3F 00 00 90 14 00 00 00 00 00 00 00 00
>         99 FF 13 40 B6 62 7F 99 00 00 00 00 00 F0 7F 40
>         00 00 00 00 00 00 00 00 00 00 24 40 00 AF CF DC
>         99 FF 13 40 00 00 78 BB 00 00 00 00 00 00 00 00
>
>
>
>   Application resource tracking details
>===========================================
>
>
>Selectors
>=========
>
> sel   base     limit  type D mem count
>----------------------------------------
>018F 00430000 00004000 DATA 32 Y xxxx
>019F 00430AEC 000001D8 DATA 32 Y xxxx
>01A7 00000000 FFFFFFFF CODE 32 N 0001
>01AF 00000000 FFFFFFFF DATA 32 N 0002
>01B7 00430D08 00000043 DATA 32 Y xxxx
>
>Total selectors: 0005
>
>
>Linear memory blocks
>====================
>
> handle    base    length
>--------------------------
>00435000 00435000 000DE000
>00430AEC 00430AEC 000001DC
>00430CD0 00430CD0 00000018
>00430D08 00430D08 00000044
>
>Total Linear memory: 000DE238 (000E2000) in 00000004 blocks
>
>
>Linear memory locked
>====================
>
>  base    length
>-----------------
>2ED0004C 0000000B
>
>
>DOS memory blocks
>=================
>
> sel   base    length
>----------------------
>
>
>Protected mode interrupt vectors
>================================
>
>No sel   offset
>----------------
>
>
>Protected mode exception vectors
>================================
>
>No sel   offset
>----------------
>
>
>Real mode interrupt vectors
>===========================
>
>No seg offset
>-------------
>43 05AD 6E07
>
>
>Call-Backs
>==========
>
>  real        target
>-----------------------
>
>

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/POVring.html
=Bob

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