{"id":6125,"date":"2023-05-12T12:02:46","date_gmt":"2023-05-12T12:02:46","guid":{"rendered":"https:\/\/3dcoat.com\/documentation\/?post_type=manual_documentation&p=6125"},"modified":"2026-03-10T22:12:24","modified_gmt":"2026-03-10T22:12:24","slug":"opacity-transparency","status":"publish","type":"manual_documentation","link":"https:\/\/3dcoat.com\/documentation\/manual\/workspaces-rooms\/paint\/opacity-transparency\/","title":{"rendered":"Opacit\u00e9 - Transparence"},"content":{"rendered":"\n

Vous pouvez peindre la transparence simplement en effa\u00e7ant sur le calque 0 ou en effa\u00e7ant sur un calque et en masquant le calque 0. Lorsque vous export , la carte de transparence sera dans l’alpha de la texture de couleur export\u00e9e.
Lorsque vous masquez Layer0, chaque couleur que vous peignez dans l’un des calques est consid\u00e9r\u00e9e comme la carte de transparence. <\/p>\n\n\n\n

Consid\u00e9rez l’opacit\u00e9 comme la valeur alpha de la couleur RBGA. Pour obtenir une variation d’opacit\u00e9 (ajouter un mat\u00e9riau semi-transparent, etc.), il vous suffit de peindre avec une valeur alpha. Ensuite, lorsque vous masquez le calque 0, vous voyez maintenant semi-transparent ou enti\u00e8rement transparent avec la valeur alpha de la couleur du calque.<\/p>\n\n\n\n

Ou vous pouvez d\u00e9finir l’opacit\u00e9 du calque, par exemple si vous d\u00e9finissez la valeur d’opacit\u00e9 du calque 1 sur 0,3, puis masquez le “calque 0” maintenant, vous devriez voir 0,3 couleur alpha du calque. (semi-transparent)<\/p>\n\n\n\n

La raison pour laquelle la couche 3DC garde la “couche 0” visible\u00a0: elle permet \u00e0 l’utilisateur de colorier facilement (\u00e9craser la couche 0) le maillage. (le calque 0 conserve l’alpha \u00e0 1,0 (pas de transparence) et la couleur parfaite \u00e0 0,5 0,5 0,5 RVB). S’il n’y a pas de calque 0, vous ne verrez peut-\u00eatre aucune surface jusqu’\u00e0 ce que vous import la carte ou que vous peigniez r\u00e9ellement sur la surface d’un autre calque. il rend difficile \u00e0 peindre.<\/p>\n\n\n\n

Apr\u00e8s avoir peint ou ajout\u00e9 un mat\u00e9riau intelligent avec une valeur alpha, masquez le calque 0<\/strong> , puis export la carte de couleur (diffuse\/alb\u00e9do) au format RVBA (png, tiff, etc.). Ensuite, la carte de couleurs export\u00e9e conserve la valeur alpha. Ou vous pouvez choisir l’option d’ export la carte “Opacit\u00e9 noir et blanc” avec la carte de couleurs RBG. <\/p>\n\n\n\n

Utiliser la valeur alpha de la couleur ou export en tant que carte d’opacit\u00e9 (noir et blanc) d\u00e9pend de l’application de rendu que vous pouvez utiliser.<\/p>\n\n\n\n

Si vous ne pouvez pas obtenir de transparence, m\u00eame si vous changez l’opacit\u00e9 du calque 1 en 0,5, etc., vous avez peut-\u00eatre un autre calque sup\u00e9rieur sur lequel peindre. Ou vous pouvez changer la mani\u00e8re de “m\u00e9lange de couleurs” (dans le panneau des calques, vous pouvez choisir comment la couleur se m\u00e9lange avec le calque ci-dessous. Par d\u00e9faut = m\u00e9lange standard)<\/p>\n\n\n\n

Peut \u00e9galement ajouter de la couleur avec opacit\u00e9 (alpha) avec l’utilisation du masque de gel du pochoir ou utiliser le mat\u00e9riau intelligent avec l’ajout d’un masque.<\/p>\n\n\n\n

S’il ne s’agit que d’un probl\u00e8me de rendu d’affichage, il vous suffit de d\u00e9finir “l’\u00e9limination de la face arri\u00e8re sur OFF” et “l’ordre alpha correct” dans le menu d’affichage. Comme \u00e7a: <\/p>\n\n\n

\n
\"getalpha.thumb.JPG.59b73583b75cffe5b91777dddc57fbce.JPG\"\/<\/a> <\/figure>\n<\/div>\n\n\n

N’oubliez pas certains attributs de calque<\/a> int\u00e9ressants tels que “VERROUILLER LA TRANSPARENCE DU CALQUE” et “MASQUE AVEC CALQUE…” ainsi que des actions telles que “GEL PIXELS PEINTS” ou “GEL PIXELS TRANSPARENTS” dans le menu Calques (vous pouvez \u00e9galement modifier la transparence du pinceau ). <\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

Exemple : d’abord \u00ab EFFACER \u00bb le calque z\u00e9ro, dessinez quelques traits d’herbe (un mat\u00e9riau d’herbe ou peut-\u00eatre juste une silhouette) puis \u00ab VERROUILLER LA TRANSPARENCE DU CALQUE \u00bb : maintenant, tous les autres traits de sp\u00e9cification\/couleur (dans le m\u00eame calque) n’affecteront que le pr\u00e9 -herbe peinte.
De plus, vous pouvez utiliser ce calque comme masque pour les calques suivants. De cette fa\u00e7on, le “Grass Layer” sera le calque de transparence pour tous les autres. N’oubliez pas de jouer avec “FREEZE PAINTED PIXELS” ou “FREEZE TRANSPARENT PIXELS” (& n’oubliez pas d’ export en psd\u00a0!. Extrayez un alpha dans photoshop ou dans Maya , il vous suffit de d\u00e9finir l’attribut de fichier PSD “Utiliser comme alpha” \u00e0 la “transparence”) <\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

La feuille a \u00e9t\u00e9 peinte d’un seul trait (notez qu’il y a une texture et un mat\u00e9riau MASQUE : hauteur, couleur et rugosit\u00e9) <\/p>\n\n\n

\n
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