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[1.7.1 XP64] Simulens dosnt work through glass

Posted: Thu Jan 15, 2009 10:24 am
by pwrdesign
No comments needed :)

Image

Posted: Thu Jan 15, 2009 11:13 am
by tom
It's because the panels in the front are clipping the energy and it's correct. On the other hand, Simulens has no idea about the scene, so a possibility for such a bug is already completely impossible.

Posted: Thu Jan 15, 2009 11:31 am
by pwrdesign
OK, then its not a bug, Ill guess I have to skip simulens for 98% of my renders then, because it makes the image unusable :(

Reality can be though sometimes hehe

Thanks!

Posted: Thu Jan 15, 2009 12:16 pm
by tom
pwrdesign wrote:Ill guess I have to skip simulens for 98% of my renders then, because it makes the image unusable :(
You know, I have to disagree :)

See, how different glasses filter light and reduce the impact:
Image

Posted: Thu Jan 15, 2009 12:31 pm
by pwrdesign
did a quick Real life test:

Image

Posted: Thu Jan 15, 2009 12:32 pm
by pwrdesign
tom wrote:
pwrdesign wrote:Ill guess I have to skip simulens for 98% of my renders then, because it makes the image unusable :(
You know, I have to disagree :)

See, how different glasses filter light and reduce the impact:
Image
OK, cool effects, but for this image and the images I'm creating, I have to reach a certain feeling to help our architects to sell an idea, and in this case the filter effect dosnt really help as you can see :)

Posted: Thu Jan 15, 2009 12:51 pm
by tom
pwrdesign wrote:OK, cool effects, but for this image and the images I'm creating, I have to reach a certain feeling to help our architects to sell an idea, and in this case the filter effect dosnt really help as you can see :)
I'm not demonstrating effects. I think you completely misunderstood what I'm trying to mean with the word "filter". There're no post effects or filters I'm using. I'm trying to say your glass material is blocking the energy coming off from the light sources. It is 101% possible to render the same thing in your photo reference when you correct your glass material and make it matching with the real glass you're trying to simulate.

See, there are 2 different glass materials in the example animation I've sent. They have different reflection and transmission/absorption settings, so they *filter* the light coming off from the emitters to camera. And when the glass blocks/cuts the light like this, it's absolutely physically correct you won't be able to have same glare/bloom around the emitter behind such a glass like you have it around a naked emitter. I hope it's clear enough.

Posted: Thu Jan 15, 2009 1:39 pm
by pwrdesign
Ok I'm starting to understand what you mean?

What kind of glass material should be used to not get this filter effect of the simulens then?

The glass panels in my scene will be regular glass about 5 mm thick with some photos printed on them. The glass screens in my 3D model is modeled 5mm thick and I'm using AGS glass. I guess that my AGS glass material is the issue here.

Can you share what kind of glass material you've used to not filter away the simulens effects?

Regards Patrik

Posted: Thu Jan 15, 2009 3:29 pm
by Bubbaloo
I totally agree with Tom. Especially since you are using AGS, which cannot be physically accurate. It is meant as a shortcut to achieve quickly clearing glass. Also, since the main component of AGS is a purely reflecting layer, you are reflecting (or blocking) a lot of light energy from getting through to the camera, reducing the amount of bloom. I bet if you reduce reflectivity on the AGS, you will get better Simulens effect through the AGS.

Posted: Thu Jan 15, 2009 3:39 pm
by tom
AGS is not incompatible as well. You can still use AGS, although I need to see your material for the solution. Mine were low grade glasses with low and high attenuation. As low attenuation starts terminating the traveling light earlier, it blocks the emitter more than the other does. You should be doing something very wrong to cut the intensity like that. Even 50% reflective AGS wouldn't be able to do that.

Posted: Thu Jan 15, 2009 3:54 pm
by pwrdesign
I have a higher reflective value than that, about 70% to get some effects the customer wanted.

I'll do a test with lower reflective value, and also with some low grade glass.

Posted: Thu Jan 15, 2009 4:05 pm
by kami
if the simulens effect bothers you too much, you can always do the same in photoshop. I always use this workaround because mxcl crashes on almost every rendering with simulens.

Posted: Thu Jan 15, 2009 4:46 pm
by hyltom
kami wrote:if the simulens effect bothers you too much, you can always do the same in photoshop. I always use this workaround because mxcl crashes on almost every rendering with simulens.
Have to agree. I have tried few times to use it and i have always experience some crashes.

Posted: Thu Jan 15, 2009 6:05 pm
by tom
pwrdesign wrote:I have a higher reflective value than that, about 70% to get some effects the customer wanted.
I guess your reference photo is not one of the examples. Can you show some samples so I can help better?

Posted: Fri Jan 16, 2009 2:04 am
by polynurb
hyltom wrote:
kami wrote:if the simulens effect bothers you too much, you can always do the same in photoshop. I always use this workaround because mxcl crashes on almost every rendering with simulens.
Have to agree. I have tried few times to use it and i have always experience some crashes.
are you people running 32bit OS?.... just wondering.. because i have applied simulens to images beyond 12MP without it ever crashing.. really i never had problems with it in 1.7.. but it takes ages for big images
i did crash on me in earlier versions of maxwell or it just stopped crashing
when i switched to 64bit.