Strange vRaytoon behaviour

[Pixelab]

I did some render test recently for a model view, and I've planned to use vray toon for the finals.

RC3 was used

Despite the fact that it cannot be "unbaked" from the render and rendered separately (a technique exist to get the mask of the toon pass with the alpha, but it's quite time consuming switching all you model in alpha -1, or using normal cam and white color(see below)) I had some other strange issues and didn't find a trace of these in the forum.

Anyway, here are the facts :

- The vrayToon pass is also baked into the vrayWirecolor pass, which is quite annoying in my particular workflow. Bug or normal issue ? happens with normal & vrayCam

- I didn't managed to render the lines other than black... any color chosen appears black. Note that does only happen with a vrayCam, so I think it's a bug...

two crops : (vrayCam + toon color set to red)

[vlado]

Neither of these is strictly a bug.

For the physical camera, the exposure causes the toon lines to be darkened, which is why they always appear black. You can work around this by putting an Output map into the color slot of VRayToon and boosting up the multiplier.

I suppose this particular issue can be avoided by making VRayToon to ignore color mapping exposure.

For the black wireColor element, you get this result because the wireColor element takes object transparency into account. Since VRayToon affects the transparency (by blocking colors where the toon lines are), it will also affect the wireColor element (and many of the other elements, for that matter).

I am not sure if a work-around for this can be implemented. You can avoid this if you turn off the filtering option of the wireColor element, but of course in that case you will not get any AA in it.

Of course, another solution is to render the toon lines separately.

Best regards,
Vlado

[Pixelab]

thanks a lot for these crystal clear explanations, that let me thinks that finally, the better way is still to do the lines in a second rendering and add it in post (allowing color & transparency tweak)