Here's a few variations on the stain and wood grain. Each of these was accomplished by changing only one or two numbers from the default values. I've overdone them so you can easily see the differences. These renders were done without raytracing.

There are currently 50 parameters - and more to come.

 BoardLength = 72
 BoardWidth = 6
 BoardOffset = 0
 BoardOffsetVariation = 0
 
 RingsPerInch = 5

 GrainVariation = 5
 GrainJitter = 0

 CoreAxis = 1

 WoodColor1 = IColor(197, 136, 45)
 WoodColor2 = IColor(230, 174, 94)
 WoodColorBias = .5
 RandomDarken = .1

 StainColor = IColor(150, 83, 38)
 StainStrength = .7
 StainOpacity = .1

 StainSpan = 0
 StainSpanInterval = 20
 StainSpanIntervalVariation = 20
 StainSpanMin = .3
 StainSpanMax = .7
 StainSpanTransition = 2

 StainMottle = 0
 StainMottleSize = 50
 StainMottleBias = .5

 Bevel = 0
 FakeBevel = 0
 Gap = 0
 Miter = 0
 Butt = 0
 Fillet = .1
 Chamfer = 0
 ChamferColor = None

 Panels = 0
 PanelContour = None
 PanelTop = 0
 Panel2Top = None
 Panel3Top = None
 PanelBottom = 0
 PanelLeft = 0
 PanelRight = 0
 PanelOpacity = None

 Reflect = .25

 Seed = 1

 X = U
 Y = V
 Scale = 968.992188
 XScale = 100
 YScale = 100
 InchesPerX = 10.3200005
 InchesPerY = 10.3200005

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)