advanced rendering for AutoCAD
This one introduces two new engines. Both of these are very experimental at the moment. I may not retain either of them if they don't prove useful. Although they appear very stable, there may be some hidden bugs. Be careful using these for production until we have some confidence in their stability and characteristics. The engines are only accessible via the nXtEngine AutoLisp command use (nXtEngine 2) -OR- (nXtEngine 3).
Both engines include more light pathways than the current product does and can therefore potentially provide more accurate solutions. Two "tricks" which are used in the first two engines, transparent shadow rays and daylight portals, are not used in these new engines. This gets rid of two big sources of inaccuracy. Caustics pathways are automatically included.
Engine 2 can be much less noisy than the Path Tracer for most interiors. It's convergence, on the other hand, is not as graceful and will include some discrete artifacts. It's usually a lot faster than the Path Tracer for interiors.
Engine 3 is a little more accurate than Engine 2, particularly when window coverings are involved. It converges more gracefully, but slower for some interiors. It is considerably faster on some exteriors.
Some things to keep in mind with these engines:
Let me know what you think-- I'm looking for feedback here.
Night shots from distance may be difficult with the new engines.
It's hard to say-- you need to let it run longer. Engine 2 is not exhibiting any light leaks, those are other artifacts. I would try that one for a while and see how it does.
With engine 3, all indirect lighting uses photon mapping, hence the spots that gradually resolve. With engine 2, only caustic paths use photon mapping. Try using engine 2 for this one and let it run a bit.
Hi Roy, I'm experimenting new engines with the room model (remeber?). Well, engine 2 crashes when finishes loading the model and autocad shuts down. Engine 3 works pretty fine.
What was the name of the model?
it was "stanza_tootal_NOCHE_bj.dwg". I uploaded it as "stanza_out" in several zip files.
Win 7 pro. 64 bits. Autocad 2011. Engine 2 crashes Engine 3 is running.
Can you upload the model?
File already uploaded
The crash is occurring on models with more than 32 lights. I've got it fixed and am letting yours run for a bit. I'll update soon.