Cg-Lion Wood Presets Pack 1.0
Does the CG-Lion Wood Presets Pack 1.0 wood pattern generate knots?
No.
The CG-Lion Wood Presets Pack 1.0 doesn't generate knots.
It generates a continuous wood 3D wood pattern that doesn't need UV coordinates in the model.
Can CG-Lion Wood Presets Pack 1.0 be used with existing UV's in the model?
Yes.
In that case the UV output of the Texture coordinates node should be connected to the Mapping node instead of the Object Output.
And usually the mapping scale and rotation will need tweaking to appear correctly.
Does CG-Lion Wood Presets Pack 1.0 render on GPU
Yes.
How can I change the direction of the wood pattern to an axis other than X?
You can set the direction of the wood pattern to any direction by changing the Rotation values in the Mapping node that is connected to the 'Pattern Coordinates' input of the CGL_Wood_3D shader.
Does CG-Lion Wood Presets Pack 1.0 support the Eevee render engine?
No.
CG-Lion Wood Presets Pack 1.0 is designed to work with Cycles (CPU and GPU)