В Хелпе же всё есть...
Graphics3D 640,480
Camera=CreateCamera()
Light=CreateLight()
RotateEntity light,90,0,0
Cube=CreateCube()
PositionEntity Cube,0,0,5
tex=CreateTexture( 256,256 )
SetBuffer TextureBuffer( tex )
ClsColor 150,200,250
Cls
Font=LoadFont( "arial",35,True )
SetFont Font
Color 0,0,255
Text 0,50,"This texture"
EntityTexture Cube,Tex
Repeat
TurnEntity Cube,1,1,1
UpdateWorld
RenderWorld
Flip
Until KeyHit(1)
End