If you use Mental Ray, then use the baVisbool shader. If you use Arnold, then you can use it, but it does not work for shadows. See attached examples. Do not use UVs for the inside, use true 3D shaders that use a spatial projection (Mray) or object-centered projection (MRay+Arnold). Perhaps not what you are searching for, but if you have something like a Tomato, then this should not be an issue at all. There are a lot of options: Volume/Gradient mixer: If you have some air inside the object, you might want to use the volume shader. Combined with a gradient mixer to control the chocolate/duff shading. http://www.binaryalchemy.de/develop/shd_vol/img_prod/Ehrmann.jpg Falloff Primitive: http://www.binaryalchemy.de/help/baEssential/Shader/Volume_Density_/Falloff_primiti/Falloff_primitive.htm Cell3D shader: http://www.binaryalchemy.de/help/baEssential/Shader/Texture/Cell3D/Cell3D.htm Flakes: http://www.binaryalchemy.de/help/baEssential/Shader/Texture/Flakes/Flakes.htm Fractal: http://www.binaryalchemy.de/help/baEssential/Shader/Texture/Fractal4D/Fractal4D.htm baRecuresive to place texture planes in a 3D space or combine other 3D shaders: http://www.binaryalchemy.de/develop/shd_vol/img/Texture_recursiv.jpg Holger Schönberger technical director The day has 24 hours, if that does not suffice, I will take the night
_____ From: [email protected] [mailto:[email protected]] On Behalf Of Steven Caron Sent: Friday, September 16, 2016 8:06 PM To: [email protected] Subject: Re: Volume/voxel construction/deconstruction Which renderer? I think Holger had his visbool shader working in MentalRay and Arnold. For a renderer agnostic route you are going to need to do some sort of booleans, obviously those can be tricky and crash a lot. There is VDB tools from Oleg which doe CSG operations on levelsets and of course Houdini's VDB tools if you have access to it. Shading is going to be tricky if you need to transfer UVs to the VDB. Oleg's tools don't have that functionality but Houdini does. Steven On Fri, Sep 16, 2016 at 8:57 AM, Adam Seeley <[email protected]> wrote: Hi all, Just thought I'd tap into the collective thought process to see if anyone had seen techniques to do this before. I'm looking at creating an effect where an object dissolves away but cleanly, so I need to show a cutaway section of the object (e.g. tomato), but one that moves through the object. A bit like a ct scan, but in full colour, so we see the various internal construction of the parts of teh object like the fibres within the flesh of the object. ------ Softimage Mailing List. To unsubscribe, send a mail to softimage-request@listproc. <mailto:[email protected]> autodesk.com with "unsubscribe" in the subject, and reply to confirm.
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