Yes you can-- the original material libraries are not altered in any way. We have heard some vague reports of problems when both ar4 and nxt are running in the same AutoCAD session. Nothing firm yet, but you might want to avoid this scenario if possible.
Well installed NXT and converted materials. Now going back to AR4 the materials show correctly in preview/selection box but lose any image (decal), information when rendering. Any ideas on how to de-convert the materials back to AR4? Thanks.
The ar4 materials have not been touched during the conversion. They've been treated as "read-only" so no data has been lost. Same goes for ar4 search paths. The most likely explanation is that you're attempting to run both apps at the same time. Make sure all sessions of nXt are shut down-- run a new AutoCAD session w/ ar4 loaded and you should be OK. Let me know.
No, same thing. Materials all show ok in 'Assign material' box, but (decal assigned ones), are 'black' in the material list and render as black in colour. Checked the last update on the mlibs, which was yesterday. Only installed Nxt today, so as you say, they haven't been altered.
"Yeah-- like I mentioned the caustics are accurate but could be annoying. Things that might alter it include changing the sun angle so it's not striking the chair's metal surfaces so directly, changing the roughness of the chair…"
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"You can see from these two images that there is definitely something wrong with reflective surfaces.
It appears the light is being reflected, but not objects or textures.
In the nXt version (top image), the carpet texture is being reflected in the…"
"It's interesting-- overall the quality of this interior is very high for that short amount of processing, and may be acceptable for certain scenes. In this one, however, there are some reflective caustics that are taking longer to…"
"ARDECAL now works.
Here's the image after 10 minutes of rendering.
I do have a slight concern that reflective surfaces seem rather dull.
This is particularly evident on the end frame of the desk and the base of the chair."