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A simpler test case as per @WestLangley directions - http://is.gd/Q66AoI

As I suspect the issue could lie with any given part of the project, since the graphics code seems to be nearly identical to a working version besides formatting - however this still demonstrates some 'streaking' on the non-updated edges of the canvas.

When using CanvasRenderer, and the material is THREE.SpriteCanvasMaterial, the variable _elemBox in the function renderSprite() can be too small for some reason. This leads to a clear area that is too small.

http://threejs.org/examples/canvas_interactive_particles.html has the same problem.

Here is the problem:

context.arc( 0, 0, 1, 0, 2 * Math.PI, true );

must be replaced by

context.arc( 0, 0, 0.5, 0, 2 * Math.PI, true );

Just as a PlaneGeometry( 1, 1 ) has width 1, SpriteCanvasMaterial.program() must draw inside a box of size 1 x 1.

Hmm. I have updated the simple example, but it still shows the same issue - as does my main project with the same alteration.

I have confirmed in both, under stock r63 with no settings altered, that in this example "Renderer.autoClear = true" - how can this be true and not be clearing the canvas? From my research the 'standard' clear operation with canvas is to draw a rectangle the 'clear colour' ?

Apologies - the simple example is now working. I will spend some time inferencing the differences between that and my full scale project, however that is largely what I have been doing already with the examples, without success.

I would assume this means it is fine to close this issue, @WestLangley ?

I would assume this means it is fine to close this issue, @WestLangley ?

I'd say so.

It appears that the bug is still present http://jsfiddle.net/Bretto/ugR3v/ you can see the trails behind the texts on the edges of the canvas... how can I clear those ? thanks