Basic blur node

[Art48]

Hi,

I know this might not be VRay/CG territory but I'm just asking:
Is it possible to have a VRayBlur texture node? Basically blurring an input node (gauss/box/etc)?
I looked around on this internet thing and couldn't seem to find such a node. To me it seems pretty basic - is there something I'm missing?

[Moriah]

+1 I think i requested a VrayColorCorrection node that also had a blur parameter in it. Would be great since max CC node sucks.. :P

[Art48]

Yes indeed.

[vlado]

Blurring an arbitrary texture can be quite slow; it can be optimized for bitmaps since they have mip-map levels, but f.e. blurring a Noise texture can only be done by sampling the texture at multiple points (f.e. 9 or 16) around the shaded point, which may be quite slow.

Best regards,
Vlado

[Art48]

Hm...I think I would still prefer to have such a node. I don't know about what magnitude of slow we are talking but I think I would still prefer to have it available.

[super gnu]

me too.. the lack of any proper blurring in the max material setup is quite annoying. i dont care if its a bit slow. besides, id imagine optimisations could be done.. f.e. a blurred procedural would not need to be sampled at as high a resolution as a sharp one? or is that not the case?


ive actually often wondered why there is not some kind of resolution "clamp" available for procedurals.. since their essentially infinite detail levels cause aa issues and unnecessary calculations, it would be nice to limit their detail when rendering?


there is a similar issue when using them to modulate a volume grid.. they are dog slow to render, since the detail is enormous.. often much higher than required.

its possible my understanding of the whole subject is somewhat flawed though.

[vlado]

ive actually often wondered why there is not some kind of resolution "clamp" available for procedurals.. since their essentially infinite detail levels cause aa issues and unnecessary calculations, it would be nice to limit their detail when rendering?

The Max Noise texture already does that - it reduces the number of fractal levels based on distance; for points that are very far away it returns just a flat color.

Best regards,
Vlado

[Art48]

Also the fractal levels kinda clamp its detail doesn't it?

[super gnu]

yes of course, but not all procedurals have a "fractal levels" setting. im thinking more the ability to undersample procedurals in much the same way that a bitmap can be. i guess just baking them out is an answer.. but then you lose the procedural/ 3d nature of them.

[atrask@hksinc.com]

Did this ever happen?

[Art48]

Not to my knowledge

[thescopeteam]

still missing a blur node got the swap to Blender

https://blender.stackexchange.com/qu...der-compositor

[dgruwier]

still missing a blur node got the swap to Blender

https://blender.stackexchange.com/qu...der-compositor

There's no blur shading node in Blender, that's a 2D compositing node.