Change Texture Color

Maybe you could use this, you need to grayscale the original texture. It uses a small 2nd texture to change the color.

Graphics3D 800, 600, 0, 2
SetBuffer BackBuffer()

camera= CreateCamera()
MoveEntity camera, 0, 0, -5

cube = CreateCube()

tex2 = MakeTexture(256, 256)
EntityTexture cube, tex2

tex1 = CreateTexture(2, 2)
EntityTexture cube, tex1, 0, 1

Repeat
	
	red = Cos(tme +   0) * 127 + 128
	grn = Cos(tme +  90) * 127 + 128
	blu = Cos(tme + 180) * 127 + 128
	tme = tme + 5
	
	FillTexture(tex1, red, grn, blu)
	
	RenderWorld()
	
	Flip
	
Until KeyHit(1)

End
	
	
Function MakeTexture(w, h)

	oldb = GraphicsBuffer()
	tex = CreateTexture(w, h)
	SetBuffer TextureBuffer(tex)
	For x = 0 To w
	For y = 0 To h
		c = Rand(255)
		Color c, c, c
		Plot x, y
	Next
	Next
	SetBuffer oldb
	
	Return tex

End Function

Function FillTexture(tex, r, g, b)
	
	oldb = GraphicsBuffer()
	SetBuffer TextureBuffer(tex)
	ClsColor r, g, b
	Cls
	SetBuffer oldb
End Function