Fr/Du/dv map

Les du/dv maps sont utilisés pour les réfractions DirectX 8. Vous serez amené à en créer pour l'eau, un matériaux Refract.

Si vous utilisez Photoshop créer une du/dv maps est très facile, il vous suffit d'utiliser le plugins nVidia's texture tools. Vous pouvez aussi la créer vous même, si vous souhaitez ne pas utilisez le Plugins ou un autre logiciel que Photoshop. La créer manuellement est facile et seul deux étapes sont nécessaires.

1. Open the normal map. First go to Colors->Negative Image (PaintShopPro) or whatever inverses all the colors in your paint program.
2. Now go to Colors->Adjust->Brightness/Contrast (or your paint program's equivalent). Leave brightness at 0 (Photoshop tends to produce more accurat results with brightness set to -17), but raise contrast as high as it will go.

DuDv maps with only pure yellow, green, red and black tends have some artifacts ingame. There for you should mix it up a bit with the original normal map. In Photoshop this is best done by puting the normal map as a layer on top of you dudv image set opacity to 50% and blending mode to hard light.

That's all! Just save and you're done..

See also

• Normal2dudv - utility to convert normal maps to dudv maps
• Height2Normal - utility to convert height maps to normal maps