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Why is this not allowed?


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for(var i = 0; i < 4; i ++){
                const triN = drawFaceTriangle(videoData.video_face_data.frames[0], renderTexture, faceData, mediaTexture);
                app.renderer.render(triN, renderTexture);
            }

 [.WebGL-000002191D5EC530] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture.

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12 minutes ago, ivan.popelyshev said:

input = output in your case, cant use renderTexture in sprite that is being in the same renderTexture. Its WebGL restriction. use another renderTexture.

But that I my intention. That the output becomes the input. Any workarounds?

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use two renderTextures, one of them is active. re-render one to second. I use that in pixi-layers: https://github.com/pixijs/pixi-layers/blob/master/src/Layer.ts#L68 , however my particular implementation somehow fails in v5, i didnt investigate yet :)

If you learn how to do it with two textures and changing sprite texture every time - you can go even further and try to make a fake texture that points to one or another, here's the trick from the same file:

	        if (group.useDoubleBuffer) {
		        renderer.texture.unbind(rt);
		        this.currentBufferIndex = 1 - this.currentBufferIndex;
		        let buffer = db[this.currentBufferIndex];
		        (rt.baseTexture as any)._glTextures = (buffer.baseTexture as any)._glTextures;
		        (rt.baseTexture as any).framebuffer = (buffer.baseTexture as any).framebuffer;
	        }

anyway, its not possible without two renderTextures. PixiJS does have flip-flopping only in FilterSystem and its not usable outside

Edited by ivan.popelyshev
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