Al/Rich
Finally got some time to do a quick comparison on the different rendering engines in IRendernXt
Packet mode - 100 passes 20mins 26 seconds
Path Tracer - 100 passes 55mins 48 seconds
Test Engine 4 -100 passes 13mins 48 seconds
I like the new one - Test engine 4 - the caustics in the pool area are really really great, never mind the speed increase. There do seem seem to be areas yet to resolve but very impressed. Looks like a cross between the two above.
Ps Just wondering if you want the model for a sample for user test renderings
Cheers
Richcat
Replies
May be you are right. I have not used E4
It's very nice but as I said, this render engine doesn't take care about refraction and let to see very straight lines under the water.
It's where E4 is better.
Hi again!
As promised I apply 3 shots made with packet mode, no caustic. I think there is still a large room for improvement, however the water seems to me quite convincing. I forgot to apply intensity on the plant pot which spoils a bit the overall impression, maybe next time will be more careful :)
Richcat - I would still love to put your model on the 3D warehouse, and perhaps open it up for our SketchUcation threads where we let people render it with other rendering engines for posting on ShetchUpRendering.com
It would be great to have scenes and layers to isolate the boxes one at a time for people who want to use it as a starting point for experimentation.
One thing about the engines, is that they sometime don't use or need all the settings.
For example, Engine 4 always does caustics, so if you compare a rendering of transparent objects, without caustics turned on, in Packet Move vs the same model, with automatic caustics in Engine 4 you will see a definite difference. Some of these things are off by default in Packet Mode, because we want to make a quick Packet Mode rendering as fast as possible by leaving out some effects unless they are needed.
Richcat said:
@Richcat, you are right about water effects and maybe abut glass rendering also, for other situations, I think the difference is maybe not so significant.
I'll try to add caustic bit.
Do you know what new options "Attenuation" and "Dispersion" are for?
@ivo, I don't really agree with you when you say that the rendering engine is not important. That's sure that the material setting is the key. But our tests show that, based on the same settings, rendering results could be quite different and it appears that some of them are "specialized on some materials.
I think you are right when you say that main effects quickly appear but they can be more precise with the time.
It's specially true with light effects, about refraction for exemple.
For Path tracer and engine 4 it's a bit different because first passes give very grainy images and it really takes time to get fine results.
We are interested by you next results.
Hi everybody!
I see your tests and fnid them really interesting. By chance i recently made i similiar render shot like that one with the house and swimming pool. I used no caustic effect for water. Just grabbed one of the water sample texture in sketchup, pulled out a bit the scale: 5.40 / 5.40. Irender nxt parameters for water that i applied were: intensity:0.50; sharpness:1.00; transparensy:0.92; refraction:1.33; translucency 0.00; texture wrinkled bump scale 70.94. Started packed mode and i think i got quite realistic water results both day and night render shots /had also put some underwater pool ligh beams that contributed to the final result :) too) I think that no matter the render engine, the secret is in the tuned settings for the materials. And one more thing, when the material settings are correct time lag for rendering does not matter, even in the early moments of the render one can see if things are going to happen well or not. If the start result seams awkward it won`t change for good further, at least this is my own humble experience :). Sorry that i cannot share the shots i talk about, but will do it on Monday.
Good luck! :)
Hi Alain - I've been away for a bit, on other projects. so have only just had a few moments to rely.
Interesting posts as I very very rarely do external renders. Any rendering I do now is sadly as a hobby.
The real reason I like E4 is to me it looks more natural, but as ever this is always a personal thing.
Did you use cautic switch for the pool water?
I'll try and find my original water material if your interested.
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