mr glossy - comparison test

[dagon1978]

8 samples

- dgs_fresnel (http://www.bmcaff.com/)
http://img315.imageshack.us/img315/4642/21dgsfresnel8s6m49s5tt.jpg
fg map 5m 51s
rendertime 6m 49s

- ctrl_shading (http://yashu.go.ro/pub/maya/mentalray/ctrl_shading_1.2.zip)
http://img315.imageshack.us/img315/4002/31ctrlshading8s2m38s2ht.jpg
fg map 1m 37s
rendertime 2m 38s

- mib_glossy_reflect
http://img315.imageshack.us/img315/2171/41mibglossyrefl8s3m10s9ro.jpg
fg map 2m 04s
rendertime 3m 10s

- blinn
http://img315.imageshack.us/img315/3584/51blinn8s8m19s6at.jpg
fg map 7m 21s
rendertime 8m 19s

- phong
http://img315.imageshack.us/img315/1795/61phong8s8m24s6kt.jpg
fg map 7m 25s
rendertime 8m 24s

[dagon1978]

32 samples

- dgs_fresnel (http://www.bmcaff.com/)
http://img315.imageshack.us/img315/5558/22dgsfresnel32s20m13s1tp.jpg
fg map 18m 17s
rendertime 20m 13s

- ctrl_shading (http://yashu.go.ro/pub/maya/mentalray/ctrl_shading_1.2.zip)
http://img315.imageshack.us/img315/5350/32ctrlshading32s3m29s4pg.jpg
fg map 1m 37s
rendertime 3m 29s

- mib_glossy_reflect
http://img315.imageshack.us/img315/6567/42mibglossyrefl32s3m58s8if.jpg
fg map 2m 08s
rendertime 3m 58s

- blinn
http://img315.imageshack.us/img315/8020/52blinn32s23m12s2el.jpg
fg map 21m 14s
rendertime 23m 12s

- phong
http://img315.imageshack.us/img315/2084/62phong32s23m32s4xm.jpg
fg map 21m 25s
rendertime 23m 32s



ciau :scream:

mat

[J-Wicz]

Very nice and precise reference renderings. Much appreciated! You must be a very patient person : - )

I tested out the new mib_glossy_reflect as described in the mental ray docs and at first I was very impressed by the results. But unfortunatly the render times exploded once I have put anything transparent in my test scene. Does anyone know a good setup how to have glossy reflections and transparency in a scene with acceptable rendertime?

I do like the new "streching effect" (sun set) of the mib_glossy_reflect very much.

[dagon1978]

Very nice and precise reference renderings. Much appreciated! You must be a very patient person : - )

I tested out the new mib_glossy_reflect as described in the mental ray docs and at first I was very impressed by the results. But unfortunatly the render times exploded once I have put anything transparent in my test scene. Does anyone know a good setup how to have glossy reflections and transparency in a scene with acceptable rendertime?

I do like the new "streching effect" (sun set) of the mib_glossy_reflect very much.

thanx J-Wicz ;)

i dont know for the trasparency problem, maybe i can make some test with dielectric and l_glass ;)

i like the mib_glossy_reflect "streching effect" too :thumbsup:

[dagon1978]

another test ;)

Maya 7 mr 3.4.5.2

direct + mr_arealigt + ibl

FG
rays 100
radius 20 pxl
bounces 2-1-1-1

AA
-1 / 2
Lanczos (4 / 4)


- DGS no glossy
http://img198.imageshack.us/img198/3083/00dgsnoglossy1s2m13s7tl.jpg
fg map 1m 23s
rendertime 2m 13s


1 Sample

- dgs glossy
http://img198.imageshack.us/img198/6564/10dgs1s3m52s0hh.jpg
fg map 1m 48s
rendertime 3m 52s

- dgs_fresnel (http://www.bmcaff.com/)
http://img198.imageshack.us/img198/9750/20dgsfresnel1s2m36s1uv.jpg
fg map 1m 27s
rendertime 2m 36s

- ctrl_shading (http://yashu.go.ro/pub/maya/mentalray/ctrl_shading_1.2.zip)
http://img198.imageshack.us/img198/6613/30ctrlshading1s2m28s4ok.jpg
fg map 1m 22s
rendertime 2m 28s

- mib_glossy_reflect
http://img198.imageshack.us/img198/5866/40mibglossyrefl1s2m484id.jpg
fg map 1m 28s
rendertime 2m 48s

- blinn
http://img198.imageshack.us/img198/3125/50blinn1s3m57s1tc.jpg
fg map 1m 52s
rendertime 3m 57s

- phong
http://img198.imageshack.us/img198/8748/60phong1s3m57s9cy.jpg
fg map 1m 55s
rendertime 3m 57s

[dagon1978]

8 Samples

- dgs_fresnel (http://www.bmcaff.com/)
http://img198.imageshack.us/img198/6873/21dgsfresnel8s4m53s3ze.jpg
fg map 3m 02s
rendertime 4m 53s

- ctrl_shading (http://yashu.go.ro/pub/maya/mentalray/ctrl_shading_1.2.zip)
http://img198.imageshack.us/img198/6206/31ctrlshading8s3m10s8rq.jpg
fg map 1m 22s
rendertime 3m 10s

- mib_glossy_reflect
http://img198.imageshack.us/img198/5450/41mibglossyrefl8s3m293xb.jpg
fg map 1m 34s
rendertime 3m 29s

- blinn
http://img198.imageshack.us/img198/4927/51blinn8s5m49s9jc.jpg
fg map 3m 25s
rendertime 5m 49s

- phong
http://img198.imageshack.us/img198/7606/61phong8s5m49s4qs.jpg
fg map 3m 25s
rendertime 5m 49s

[dagon1978]

32 Samples

- dgs_fresnel (http://www.bmcaff.com/)
http://img198.imageshack.us/img198/8640/22dgsfresnel32s12m21s4iu.jpg
fg map 8m 09s
rendertime 12m 21s

- ctrl_shading (http://yashu.go.ro/pub/maya/mentalray/ctrl_shading_1.2.zip)
http://img198.imageshack.us/img198/4740/32ctrlshading32s5m10s4yl.jpg
fg map 1m 22s
rendertime 5m 10s

- mib_glossy_reflect
http://img198.imageshack.us/img198/5584/42mibglossyrefl32s5m496wb.jpg
fg map 1m 56s
rendertime 5m 49s

- blinn
http://img198.imageshack.us/img198/8933/52blinn32s12m40s4oz.jpg
fg map 8m 17s
rendertime 12m 40s

- phong
http://img198.imageshack.us/img198/8348/62phong32s13m02s0pq.jpg
fg map 8m 27s
rendertime 13m 02s

[romeu]

wow, you´ve got to be impressed by the ctrl_shading render times !

[floze]

wow, you´ve got to be impressed by the ctrl_shading render times !
I guess the main reason for the speed hit is the fact that ctrl_shading does not compute glossy (but full shiny instead) after the given raydepth, which is controlled by reflect_depth, or 'Depth' in the AE. Also, there does not happen any other computation beside the plain reflection - that's probably why the mib_glossy_reflect comes closest to the rendertimes of ctrl_shading. All the other shaders like blinn and dgs_fresnel imply more complicated calculations for the reflection result, and therefore take longer to render.

Dont get me wrong, the ctrl_shading is a great shader - one of my most favorites, mainly because of it's speed and flexibility. But to compare it speedwise to a blinn or dgs_fresnel, shouldnt there be more equality of opportunity? However, I dont get why the phong is as slow as the blinn...

[dagon1978]

But to compare it speedwise to a blinn or dgs_fresnel, shouldnt there be more equality of opportunity? However, I dont get why the phong is as slow as the blinn...
do you mean the same raydepth?

[floze]

do you mean the same raydepth?
Dont know if it's clear or not, but out of the readme of ctrl_shading:
the depth is not the general reflection depth but
it acts only for blurred reflections, - up to 1 any objects reflecting the
blurred reflections we'll see perfect reflection instead.
I guess it wouldnt make much sense to suppress this optimization just for comparison. No, I meant to build in a fresnel shader for the ctrl_shading and mib_glossy for example.

Thx for the tests anyway dagon! ;)

edit: the dgs_fresnel does not use the classic dgs glossy reflection, it uses ReflectionUtility instead. Just for your info - so the ReflectionUtility would maybe be a different candidate to test?

[dagon1978]

Dont know if it's clear or not, but out of the readme of ctrl_shading:

I guess it wouldnt make much sense to suppress this optimization just for comparison. No, I meant to build in a fresnel shader for the ctrl_shading and mib_glossy for example.

Thx for the tests anyway dagon! ;)

oh ok! ;) now i've understood the word "opportunity"
but you can combine ctrl_fresnel with ctrl_shading, or use your monolithic shader for more flexibility ;)

[JulianS]

Wow dagon1978 These test are just amazing.

You think is possible to make the first scene with ctrl_shading (http://yashu.go.ro/pub/maya/mentalray/ctrl_shading_1.2.zip) downloable so some of can study it.

Thank you in adavance.

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