Can't find the solution to this sprite problem

Hope this helps, if not sorry (I was in a hurry!!!)

What Ross C said is very important, and also unfortunately not all graphic cards support the same texture sizes.

[CODE]
RenderWorld
Flip
WaitKey
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You've flipped the buffers, so the sprites are now on the FrontBuffer(), not the BackBuffer()

[CODE]
; A tip(?)... ;-)

; Make your sprites parents of the camera, then you
; can position them relative to the ScreenWidth (in effect
; 1x1 texture pixels will equal 1x1 pixels on your monitor

kaart1 = LoadSprite ("kaart1.jpg",1+4+16+32,mycamera)
SpriteViewMode kaart1,3
;etc...

HandleSprite kaart1,-1,1
ScaleSprite kaart1,(0.5*ActualTextureWidthInPixels),(0.5*ActualHeightInPixels)
PositionEntity kaart1,2dScreenCoordsX-(GraphicsWidth()/2),-(2dScreenCoordsY-GraphicsHeight()/2),GraphicsWidth()

;...etc...


; this loop SHOULD do the following:

; chop the area from 0,0 to pieceSize,pieceSize in 16 tiles,

; place each tile (image) onto a texture, and place the texture on an entity (Sprite)

For y = 0 To 3
For x = 0 To 3
k.kaartstukje = New kaartstukje
k\entity = CreateSprite(Camera)

;Multiples of 16 - you can fake having different sizes
;by masking the Sprite's texture
k\texture=CreateTexture(pieceSize,pieceSize,1+16+32)

; There is no need to keep using SetBuffer().

CopyRect (x*pieceSize),(y*pieceSize),pieceSize,pieceSize,0,0,ImageBuffer(YourBuffer),TextureBuffer(k\texture)

DrawImage image,0,0
EntityTexture k\entity,k\texture

Next
Next

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Hope that helps, or at least gives you a couple of ideas - sorry I didn't have time to do something a bit more readable!