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derivative_maps_knald_1.1 [2016/01/31 23:31]
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derivative_maps_knald_1.1 [2016/02/01 01:33]
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-asd+====== Derivative Maps ====== 
 +The Derivative maps within Knald are generated on the fly from the [[height_maps_knald_1.1|Height maps]] provided by [[the_integrator_knald_1.1|The Integrator]]. They are adjustable in real time in terms of intensity via the [[the_main_tab_knald_1.1#​general|Bump Scale]] slider. 
 + 
 +You can also create Derivative maps quickly and efficiently from photographs,​ via pre-rendered Height via Knald'​s [[color_to_normals_knald_1.1|Color To Normals]] functionality and our world class [[the_baker_knald_1.1|baker]]. 
 + 
 +Please see the [[color_to_normals_knald_1.1|Color To Normals]] & [[the_baker_knald_1.1|The Baker]] pages for more information. 
 + 
 +===== What are Derivative Maps? ===== 
 + 
 +---- 
 + 
 +Derivative Maps are a recent method of bump mapping that does not use tangent spaces. This has numerous advantages over traditional normal map based workflows((http://​mmikkelsen3d.blogspot.co.uk/​2011/​07/​derivative-maps.html))((http://​mmikkelsen3d.blogspot.co.uk/​2011/​11/​derivative-maps-in-xnormal.html)). 
 + 
 + 
 +These are as follows: 
 +  * Reduces foot-print. 
 +  * Is much better suited for synthesized surfaces/​tessellation. 
 +  * Does not distinguish between regular geometry and tessellation. 
 +  * Works with per pixel generated texture coordinates such as [[http://​www.slideshare.net/​icastano/​cascades-demo-secrets|Tri-Planar Texturing]]. 
 +  * No issues regarding multiple standards for implementation of tangent space generation. 
 +  * Mirroring trivially works. 
 +  * No need to recalculate tangent spaces on meshes with complex geometric deformations. 
 +  * Better visually during texture magnification. 
 + 
 +[{{https://​s3.amazonaws.com/​docs.knaldtech.com/​docuwiki/​normal_derivative_knald.png?​nolink|Normal/​Derivative Settings}}] 
 + 
 +===== The Derivative Maps Group'​s Settings ===== 
 + 
 +---- 
 + 
 +**Flip Green:** Here you can change the axis in the dropdown to match the Normal/​Derivative maps for your engine or application as required. By default Knald is set to X+Y+Z+, so if you are using a [[normal_maps_knald_1.1|Normal]] or Derivative map that differs from this configuration,​ you will need to change this setting. To change this setting check the Flip Green check box to save your choice. 
 + 
 +**Bump Scale:** The global strength of the processed [[normal_maps_knald_1.1|Normal]] and Derivative maps. 
 + 
 + 
 +[{{https://​s3.amazonaws.com/​docs.knaldtech.com/​docuwiki/​sci_fi_derivative.jpg?​nolink&​512|Derivative Map}}] 
derivative_maps_knald_1.1.txt · Last modified: 2017/05/23 03:49 (external edit)