Patchwork 3D Community 2021.1 X5

The illumination color is found in the standard material under the diffuse tab and allows a certain luminosity to be generally added to the material. The brightness may be greater than 1.

The velvet effect in the standard material is found under the reflection tab, but also acts as a light addition, this time depending on the viewing angle on the surface. The added luminosity is given by a gradient ramp multiplied by a specifiable factor, which may be greater than 1.

If a modulation image is activated, it filters the modulation color on the surface. If the velvet effect is used, ticking the Use modulation image box modulates the effect so as to provide a more realistic appearance.

Note that an illumination layer includes a grain, which affects only the velvet effect if activated. The grain reinforces the realism, especially of fabrics.

An illumination layer operates in additive mode: its contribution is added to the lower layers.

For more complex materials, nothing prevents you from using several layers of the same type. For example, a 3D open mesh fabric may use one diffuse layer for the lower textile and another diffuse layer, made visible using the transparency effect, for the top layer. If the underside is glossy, then the latter diffuse layer will be on the specular layer of the lower layer. The organization of the material would thus be:

If you also want to use the velvet effect because the surface of the fabric is partly soft or textured, inserting an illumination at the right place will do the job: