Add Bloom to model?

Leonidas · August 6, 2020, 7:49am

Yeah, a tutorial would be great!

For the initial question, indeed a fullscreen post process effect will affect all rendered objects. Right now all post process effects created are being added to the PostEffectQueue.

That is automatically being added as layer after all layers, minus the UI, has finished rendering. So one way to have a pp effect affect only certain models is to change the order of when the effect is rendering. Most easiest way I think would be to reorder the PostEffectQueue layer to render after your custom layer rendering the models in question.

Here is the relevant part of the engine code:

github.com

playcanvas/engine/blob/1db4031ab7d8cad5fb137ac456223c6af90e2c0d/src/framework/components/camera/post-effect-queue.js#L146


var isFirstEffect = this.effects.length === 0;


var effects = this.effects;
var newEntry = {
    effect: effect,
    inputTarget: this._createOffscreenTarget(isFirstEffect, effect.hdr),
    outputTarget: null
};


// legacy compatibility: create new layer
if (!this.layer) {
    this.layer = new Layer({
        opaqueSortMode: SORTMODE_NONE,
        transparentSortMode: SORTMODE_NONE,
        passThrough: true,
        name: "PostEffectQueue",
        renderTarget: this.camera.renderTarget,
        clear: false,
        onPostRender: function () {
            for (var i = 0; i < this._commandList.length; i++) {
                this._commandList[i]();