To create an ambient occlusion map using the Transfer Map Tool’s default settings
The mesh you selected is automatically loaded as a Target and all other meshes in your scene are loaded as Sources.
It is recommended that this attribute be set to a non-zero value, for example, 1 or 2. See Fill texture seamsfor more information regarding this attribute.
Tweak this value to improve the quality of your results. Increasing the number of occlusion rays improves quality, but reduces performance speed.
This option determines the maximum length of an occlusion ray. Rays longer than this value are not considered for occlusion. This option optimizes performance and is off by default.