User Tools

Site Tools


Transmission Maps

Designed to be used as omni-directional thickness map (with an attenuation ramp) for semi-translucent materials, Transmission maps can be generated via The Integrator Mode or The Baker. In both cases they are created in much the same way as our high quality Mesh AO solution & it’s just as fast. Simply load a mesh/meshes into Knald (multi-million polygonal meshes are supported), check a box/hit Bake and then watch Knald do its magic.

After only a couple of seconds you will be greeted by your new and beautiful texture which is viewable with real-time translucency in the 3d preview window.

Transmission maps controlling the translucency of a mesh within the 3D Preview window1)

The Transmission Group's Settings

The settings found within the two Transmission groups within these modes are identical with the exception of the 'Activate' checkbox being removed in the case of The Baker.

Baker & Mesh Transmission Settings

Activate: This check box is a toggle to enable and disable Transmission via an imported mesh. A mesh must be loaded in the 3d Preview to use this feature.

Attenuation: A toggle between the Ramp Linear and Exponential Decay attenuation types.

Scale: Changes the scale of the distances before mapping it to a transmission value.

Ramp: Ramps the light and dark values within the Transmission map based upon the sliders value.

Rays: This slider is used to determine the number of samples in a discrete evaluation of the integral across the half sphere for diffuse outgoing radiance with a constant radiance field, with a minimum of 256 and maximum of 8192 rays being available.

  • A higher number or rays will increase the quality of the Transmission at the cost of speed.
  • We do not recommend going below a value of 512 rays as this can cause banding to appear in the map.
  • A value of 1024-2048 or above should be perfect for production.

Bias: A bias value based upon mesh density. A value of 10 should be good for most situations.

Knald will automatically cap open meshes before rendering which in addition to producing more visially pleasing results, negates the need for any sort of major cleanup via image editing.

An open mesh capped pre-render2)
1) Art courtesy of Warren Boonzaaier
2) Art courtesy of Dan Roarty
transmission_maps_knald_1.1.txt · Last modified: 2017/05/23 03:49 (external edit)