Doc: Improve material displacementBias description #30564
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| @@ -141,7 +141,9 @@ <h3>[property:Float displacementScale]</h3> | |||
| <h3>[property:Float displacementBias]</h3> | |||
| <p> | |||
| The offset of the displacement map's values on the mesh's vertices. | |||
| Without a displacement map set, this value is not applied. Default is `0`. | |||
| Without a displacement map set, this value is not applied. The formula is | |||
| `position * displacementScale + displacementBias` so the bias is added | |||
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I'm afraid this isn't correct or at least irritating.
The sampled value from the displacement map is scaled with displacementScale and then displacementBias is added. The (transformed) position vector is then scaled along its object normal with the above offset.
TBH, I'm not sure users must know the process in that detail....
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Well I add small trouble in my application because I first set up the bias to match my animation and then I had to find a good value again because I fine tune the scale. Was just a usage warning that could help the user.
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How about renaming position to displacementMap.x?
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Or maybe just displacement scale is applied before displacement bias ? This way no formula needs to be displayed 🤔
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The problem is that both properties are applied differently. One is a scaling factor that is multiplied, the other one in some sense an offset that is added.
How about stating the bias is added to the scaled sample of the displacement map.
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Description
Add more details for the calculation of displacementMap.