pidi_advanced_skin_shader_2
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pidi_advanced_skin_shader_2 [2020/08/25 02:03] irrsoft [Tension Map Wrinkles] |
pidi_advanced_skin_shader_2 [2020/08/30 02:50] (current) irrsoft [Tension Maps vs Region Maps comparison] |
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| The second method included with this tool to add dynamic wrinkles to your characters is called Region Maps approach. With this setup, instead of having a "Rest Pose" normal map and a " | The second method included with this tool to add dynamic wrinkles to your characters is called Region Maps approach. With this setup, instead of having a "Rest Pose" normal map and a " | ||
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| **However, when dynamic wrinkles are disabled these shaders are far more efficient than their tension map counterparts so it is always recommended that if you are not going to use Dynamic Wrinkles at all you assign a Regions Map shader to your characters, even in Mobile.** | **However, when dynamic wrinkles are disabled these shaders are far more efficient than their tension map counterparts so it is always recommended that if you are not going to use Dynamic Wrinkles at all you assign a Regions Map shader to your characters, even in Mobile.** | ||
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| Let's add regions map wrinkles to our model, but first we will need to create a Wrinkles Data Asset which will act as a list containing all of the Wrinkle Normal maps available for this character. | Let's add regions map wrinkles to our model, but first we will need to create a Wrinkles Data Asset which will act as a list containing all of the Wrinkle Normal maps available for this character. | ||
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| And on this asset, let's add all the normal maps we have generated for this model to the corresponding list. The Wrinkle Data Asset is designed to help you organize your maps, especially in projects where there are dozens of normal maps per character. On top of this, as more updates are released for this tool the Wrinkle Data Asset will gain additional features and settings that will allow you to have further control over the wrinkles on your character in an easy, reusable " | And on this asset, let's add all the normal maps we have generated for this model to the corresponding list. The Wrinkle Data Asset is designed to help you organize your maps, especially in projects where there are dozens of normal maps per character. On top of this, as more updates are released for this tool the Wrinkle Data Asset will gain additional features and settings that will allow you to have further control over the wrinkles on your character in an easy, reusable " | ||
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| Next, we need to create a regions map. A regions map defines how the different normal maps, the one from the rest pose and those from the different wrinkle maps will be blended in up to four different zones (channels R, G, B and A). Each channel represents an area of the face and each one of them will be multiplied by unique per-pose blending values. You can have one general regions map to be shared across all expression poses or override it with a unique regions map on any of the individual poses. | Next, we need to create a regions map. A regions map defines how the different normal maps, the one from the rest pose and those from the different wrinkle maps will be blended in up to four different zones (channels R, G, B and A). Each channel represents an area of the face and each one of them will be multiplied by unique per-pose blending values. You can have one general regions map to be shared across all expression poses or override it with a unique regions map on any of the individual poses. | ||
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| Once this is ready, assign the Wrinkle Data Asset, Head Bone and Regions Map to their corresponding slots. Then, press on the "ADD NEW WRINKLES SNAPSHOT" | Once this is ready, assign the Wrinkle Data Asset, Head Bone and Regions Map to their corresponding slots. Then, press on the "ADD NEW WRINKLES SNAPSHOT" | ||
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| This will add a new sub-group called **WRINKLE DATA SET** followed by a number. This data set represents a pose or expression that your character can make and contains the information of which bones or blendshapes are used for said expression and thus should be tracked, which normal map corresponds to said expression, which region map to use to control its influence in case we want to override the default one, the influence of each one of the four regions in the region map (RED, GREEN, BLUE and an inverse ALPHA channel) and finally the blendshapes and bones that have to be tracked to detect whether the character is performing the expression described in the snapshot or not | This will add a new sub-group called **WRINKLE DATA SET** followed by a number. This data set represents a pose or expression that your character can make and contains the information of which bones or blendshapes are used for said expression and thus should be tracked, which normal map corresponds to said expression, which region map to use to control its influence in case we want to override the default one, the influence of each one of the four regions in the region map (RED, GREEN, BLUE and an inverse ALPHA channel) and finally the blendshapes and bones that have to be tracked to detect whether the character is performing the expression described in the snapshot or not | ||
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| You **DO NOT** need to define a snapshot for the rest pose, this is generated automatically and stored internally. Once you have added all the blendshapes and bones that you want to track to the lists you just need to place your character in the pose you want to save and click on the **SAVE POSE SNAPSHOT** button. | You **DO NOT** need to define a snapshot for the rest pose, this is generated automatically and stored internally. Once you have added all the blendshapes and bones that you want to track to the lists you just need to place your character in the pose you want to save and click on the **SAVE POSE SNAPSHOT** button. | ||
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| In the Tension Map vs Region Map demo scene included with the asset you can see a fully set up example of the Regions Map usage with the Old Man Demo. One wrinkle snapshot has been created for each one of the five different blendshapes that the model has. In all of them the same normal map has been used but some of the expressions make use of a different region map that instead of defining regions for the sides of the mouth and both sides of the brow cover instead the brow and the forehead. | In the Tension Map vs Region Map demo scene included with the asset you can see a fully set up example of the Regions Map usage with the Old Man Demo. One wrinkle snapshot has been created for each one of the five different blendshapes that the model has. In all of them the same normal map has been used but some of the expressions make use of a different region map that instead of defining regions for the sides of the mouth and both sides of the brow cover instead the brow and the forehead. | ||
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| In the CGI Stylized demo you can see another usage of this technique, this time in a character whose animation is fully driven by bone animation and which uses two different wrinkle maps and two region maps for the small expressions set | In the CGI Stylized demo you can see another usage of this technique, this time in a character whose animation is fully driven by bone animation and which uses two different wrinkle maps and two region maps for the small expressions set | ||
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| While the regions map approach works on mobile devices as well as in most devices that support RenderTextures (which are used internally to generate additional wrinkle data) they are CPU bound and thus may not be the most performant in low end devices. For a full breakdown of the pros and cons of each method please check the table below. | While the regions map approach works on mobile devices as well as in most devices that support RenderTextures (which are used internally to generate additional wrinkle data) they are CPU bound and thus may not be the most performant in low end devices. For a full breakdown of the pros and cons of each method please check the table below. | ||
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| | Main wrinkle calculation processor | GPU | CPU | | | Main wrinkle calculation processor | GPU | CPU | | ||
| | Mobile Ready | ✓ | ✓ | | | Mobile Ready | ✓ | ✓ | | ||
| - | | SRP Ready | ✓ | | + | | SRP Ready | ✓ | |
| | Supports Decals on Mobile | X | ✓ | | | Supports Decals on Mobile | X | ✓ | | ||
| | Max. Reference poses | 3 | 32+ | | | Max. Reference poses | 3 | 32+ | | ||
| | Max. Wrinkle Normal maps | 1 | 32+ | | | Max. Wrinkle Normal maps | 1 | 32+ | | ||
| - | | Wrinkle Occlusion maps | With Occlusion Map's Alpha | | + | | Wrinkle Occlusion maps | With Occlusion Map's Alpha | |
| | Per Pose Wrinkle Weights | Automatic, variable | | Per Pose Wrinkle Weights | Automatic, variable | ||
| | Per Pose Performance Cost | Stable Performance | | Per Pose Performance Cost | Stable Performance | ||
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| Adding overlay or simple decal textures to the skin shaders is very easy. Simply go to the GENERAL SETTINGS tab and set the Decal / Overlay Effects setting to true. This will add a new tab called SKIN FX SETTINGS. | Adding overlay or simple decal textures to the skin shaders is very easy. Simply go to the GENERAL SETTINGS tab and set the Decal / Overlay Effects setting to true. This will add a new tab called SKIN FX SETTINGS. | ||
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| In this tab, you can assign up to two different color maps to be used as overlays each one to be mixed in their own unique way with three blending modes : Masked, Additive and Multiplied. Each one of these two decals can have their own color, specularity / gloss maps and be displayed either on the UV0 or UV1 coordinates channel. | In this tab, you can assign up to two different color maps to be used as overlays each one to be mixed in their own unique way with three blending modes : Masked, Additive and Multiplied. Each one of these two decals can have their own color, specularity / gloss maps and be displayed either on the UV0 or UV1 coordinates channel. | ||
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| These decals allow you to easily and efficiently add effects such as sweat, wounds, tattoos, war paint etc to your characters while having full control over how it mixes with the skin under them and all their PBR properties. They are influenced by scattering, translucency and wrinkles as the rest of the skin and are available in all platforms. | These decals allow you to easily and efficiently add effects such as sweat, wounds, tattoos, war paint etc to your characters while having full control over how it mixes with the skin under them and all their PBR properties. They are influenced by scattering, translucency and wrinkles as the rest of the skin and are available in all platforms. | ||
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pidi_advanced_skin_shader_2.1598321018.txt.gz · Last modified: 2020/08/25 02:03 by irrsoft
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