What is autobump?


Autobump is a new feature added in Corona Renderer 3. It automatically adds bump mapping to objects using displacement to enhance surface details and improve the overall image quality. This also means that the displacement quality can be lowered (in the Performance tab of the Render Setup window) while maintaining good image quality, which results in lower RAM usage. 


Autobump affects:

  • Objects with displacement coming from their materials
  • Objects with displacement coming from the CoronaDisplacementMod modifier


It is automatically enabled for scenes made with Corona Renderer 3 and newer, and there is no need to disable it. 

When an older scene is loaded, a warning message will appear, giving the possibility to enable the autobump feature, or to keep the original scene settings for better compatibility with original renders.




Examples


Autobump off


Autobump off, displacement screen size: 1 px, RAM usage: 6,3 GB



Autobump off, displacement screen size: 2 px, RAM usage: 1,7 GB



Autobump off, displacement screen size: 4 px, RAM usage: 792 MB



Autobump off, displacement screen size: 8 px, RAM usage: 558,7 MB




Autobump on


Autobump on, displacement screen size: 1 px, RAM usage: 6,5 GB



Autobump on, displacement screen size: 2 px, RAM usage: 1,8 GB



Autobump on, displacement screen size: 4 px, RAM usage: 814 MB



Autobump on, displacement screen size: 8 px, RAM usage: 566,6 MB



Comparison - autobump off, displacement size 2 px (left) VS autobump on, displacement size 4 px (right). RAM usage: 1,7 GB VS 814 MB. 


Click HERE to enlarge.



Disabling autobump

Generally there is no need to ever disable the autobump feature, but if you want to do it (for any reason - for example to test it on and off), you can go to Development / Experimental stuff rollout, scroll down to the "displacement" section, and uncheck the "Apply automatic bump" option.