corten_pavillon_22mm_1
"Thanks for your kind words.
Yes, all plants are generated with nxt plant-editor.
I have used leaves from Marc Chaumier's plant library.
(Download/ Content + Entourage)"
advanced rendering for AutoCAD
Invisible trees
Any idea how to place the invisible tree to create shadow on the facede?
I tried to mark the tree as an object and assign alpha channel to it as I did it with ground plane, but unfortunately, it doesn't work wit any plant.
My way to achieve it was to produce a png file, considering no tree overlaps the rendered object, and than get rid of the plant using PS (see attached)
The point is the existing tree is where it is. So I need the shadow on the wall, but no new tree - any idea how to do it ?
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view for background 004.png, 3.1 MB
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Replies to This Discussion
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Permalink Reply by mike makki on
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photoshop.....
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Permalink Reply by George Ioannidis on
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GIMP
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Seriously now. It could be a great addition to nXt to have the ability to enable or disable particular rays during the rendering process. For instance, in Blender Cycles, it is quite easy thing to do. You just tag the tree to cast shadow (shadow ray) but you disable all the other rays calculation.
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Permalink Reply by Jelena on
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on large non-flat surfaces like here, i sometimes use a inverted alpha-map of a tree, put it on a surface and turn this in direction of sun...
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Permalink Reply by Maciej on
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So do I, very aproximately, Jelena.
However, it would be nice just to use a nXt tree, to achieve this aim direct, wouldn't it ?
Roy, any chance in the future?
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Permalink Reply by Kevin Lockwood on
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Here's a couple ways I go after this problem.
I just tested tagging a tree as "Alpha channel" (sorry, no renders to attach). It sort of works. Nxt plants don't seem to work, but a 3d model can. I tried inserting a textured mesh and tagging, but no luck either. I finally I tried a 3d acad model of a tree, tagged it and rendered. Saving it out to Tiff with alpha omits the tree, but leaves a whole. Now, do a second render without the tree and overlay in photoshop.
Another way if the tree model wont mask fully (in some tests only the trunk masked, leaves did not) is to save the render to nxtimage, save the material mask to a file and use the selection tool to grab just the tree textures. Use that selection in the same manner as the 2 images above.
I've got a bad cold and my head feels like its full of jello. If I feel better, I'll try to post samples later.
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corten_pavillon_22mm_1
"Very nice piece. Brilliant work.
Are all these plants nxt render plants ?
They look very good. Ground cover is so thoughtful."
"Thank you so much."
"Sorry, do not exactly how to do it right.
If i sent you one or sets, could you "compose" one material as an example?
Maybe this is interesting for others too.."
"Thanks Rich,
exacvtly what i found out.
Only did't know what to dfo with the AO map.."
"nXtRender doesn't use the AO texture image settings for anything, so don't bother trying to use that.
I would start use the Diffuse textures at 100% and experiment with the levels of the Specular Reflection.
You might need to toggle the…"
"Hi,i imported some old Dosch 3D plants in nxtRender for testing, fully textured without an issue.
Also used some free sketchup tree models (*.skp) from sketchuptextureclub and opened them in sketchup, exportet them to *.obj and used them in…"
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