Unwrap Tool
Use this tool to (re)compute unwrap of your model before texturing. You may also find it useful when you want to estimate minimal reasonable resolution, once you have a model calculated.
- Optimal texel size Size of a texel corresponding to the smallest detail captured by images.
- Gutter Represents number of pixels of a chart border in a texture image. Gutter is important for avoiding visible artefacts on a model during rendering. Many rendering engines use techniques like mip-mapping, where the texture is downscaled several times to create an image pyramid. If the engine renders texture from higher pyramid levels, then a color from one chart can bleed to another chart in the interpolation process. This can happen just in case you do not have gutter between the charts large enough. The default value 2 is enough to avoid this type of artefact in most rendering engines.
- Minimal texture resolution Set the minimal resolution a texture can be. You can choose from 512x512, 1024x1024, 2048x2048, 4096x4096, 8192x8192 and 16384x16384.
- Maximal texture resolution Set the maximal resolution a texture can be. You can choose from 512x512, 1024x1024, 2048x2048, 4096x4096, 8192x8192 and 16384x16384.
- Large triangle removal threshold Let us assume that you set this value to 10. Then, in case that a triangle's edge is 10 times longer than the average edge length of all edges of a model, the system will unwrap it so that the triangle is mapped to just 1 texel.
- Unwrap method Defines the unwrap algorithm.Geometric is the legacy unwrap method. Mosaicing based (experimental) is the new method producing fewer UV islands but it is slower than the Geometric method.
- Style Defines a strategy which will be used to build a UV map. Check more about the unwrap styles here
- Calculate Unwrap Press the Unwrap button to calculate the unwrap and build the UV map.
- Checkerboard cell size Sets the size of the checkerboard texture that will be applied to the model after unwrapping. The checkerboard is helpful for previewing seams on the model in the 3D view before texturing.
- Fill textures witch checkerboard Applies the checkerboard pattern after changing the checkerboard cell size.
- Fill textures with charts Applies white color to all UV islands. It helps preview the UV map layout in the 2D view before texturing.