"Hello, I have a lot of problems with the nXtRender plugin for AutoCAD with AutoCAD 2021 under Windows 11 installed on a new machine (no problem with the same dwg's under windows 10) : - material applyed are not rendered. I have to explode…"
advanced rendering for AutoCAD
Build 302 and nXt engine 4
Completed render test using new algorithm. Wall bump pops up really nice, the glass is very convincing, chrome sphere does some really nice caustics on the teapot. The only thing I don't understand is the stripes visible on tea cups, especially on the nearest one. Looks like surface softness was lost somewhere.
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Permalink Reply by Roy Hirshkowitz on
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Nice. I'll have a new build pretty soon.
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Permalink Reply by Richcat on
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Hi George - luv it - but couldn't resist giving it a quick clean to get rid of that dust - it was far too life like. Wish we could have a go with the sketchup version.
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I'll let Al have it pretty soon Richcat-- just a few more details to work out.
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With sun and caustics.
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Permalink Reply by Jorge Javier Lara Domínguez on
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Es sol automatico Roy? Se ve muy bien la imagen
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Just "Exterior Daylight" preset. No caustics switches to set. No glass in the window in George's model, although I have a version with glass which I'll test soon (should be a very similar result.)
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Sun (slightly different angle) and single sheet of window glass. ~15 minutes-- taking a little longer to resolve but well on its way.
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Standard glass with IOR of 1.5. Because this one uses a glass window, all of the light in the scene is really a "caustic" and is calculated quite differently from the first image. It is encouraging that the results are similar.
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Fresnel for glass is based completely on the IOR-- the fresnel slider on the Transparency page should always be left alone. Same image with window glass modeled as two 3dfaces.
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Ah-- nothing at all to do with fresnel. This light path is excluded in all of the engines (intentionally). You cannot see the sun directly, nor can you see a perfectly specular reflection of it (you can't see it through a perfectly specular window either.) If you turn on Highlight under the Sun settings you will get some reflection of the sun in materials which are glossy (not perfectly specular)-- but I don't generally recommend this.
I have considered allowing this path and may do so in the future-- but it's difficult to handle. The solar disk is very very much brighter than anything else in the image. The brightest part of this image is about 25000 cd/m^2. The solar disk can be as bright as 1,600,000,000 cd/m^2. It's tough to say what it actually looks like because you can't look at it comfortably. It would also cause an enormous firefly problem...
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This is a remake of one of Peter Milner's scenes. I dont have the file. I photo-matched it in sketchup and rendered in nxt render for autocad.I just retouched it and increased the resolution.
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This is a remake of one of Peter Milner's renders.I dont have the file. I photo-matched the scene in sketchup and rendered with nxt render in autocad.I replicated it.
© 2024 Header image courtesy Peter Milner
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