_steps.clear();
// step 1: pick whether we are blooming the whole previous render buffer or just specific items
if (useBloomItems) {
// render these items to a texture
_steps.add(new EffectStep_SetRenderTarget(RT_MAIN));
_steps.add(new EffectStep_RenderSpatials(null));
}
// step 2: extract intensity
{
_steps.add(new EffectStep_SetRenderTarget(RT_SECONDARY));