Babylon postprocess to many drawcalls

Questions
1

when I add outline effect,bloom effect,dof effect to one scene,i have found if i add one mesh ,draw calls would be added five times .Is this normal? https://playground.babylonjs.com/#LRFB2D#159

2

Welcome aboard!

It’s expected:

  • the lens effect takes one draw call (by the depth renderer)
  • the glow layer takes one draw call to render in the layer texture
  • the outline rendering takes 2 draw calls, one before and one after the regular rendering (the 2nd rendering is used to update the zbuffer)
  • the regular rendering takes 1 draw call
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3

thank you for your reply,i have developed postprocess myself by three.can we get a prerender pass to collect information?E.g :depth,selected outline,selected bloom etc.that can reduce the number of renderings

4

You can use the prepass renderer to collect depth, position, normals, etc in a single pass but then you will have to implement yourself the glow, lens, outline, … effects as in Babylon they are implemented as separate effects and don’t work in a deferred way.

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