Sponza model
- Thread starter TrevorM-L
- Start date
Hi all,
I Tasted the same model with V.2.5, i used a HDRI image as a light source, i got a dark image, it looks like the light doesn't bounce eaven with diffuse scatterings set to 6!. I also didn't notice any difference between Radiosity and the AO.
It's my first test with Cheetah, so maybe did i miss some thing.
I Tasted the same model with V.2.5, i used a HDRI image as a light source, i got a dark image, it looks like the light doesn't bounce eaven with diffuse scatterings set to 6!. I also didn't notice any difference between Radiosity and the AO.
It's my first test with Cheetah, so maybe did i miss some thing.
Trust Jake.
with kindest regards
Frank
with kindest regards
Frank
Thanks for responding.
Jake, I don't have any problem to get the scene illuminated with the HDRI image, i got a similar image as yours. What i noticed is a lack of reflected lights.
Frank, in Cinema 4D it is possible to apply a HDRI tag to a sky object to illuminate a scene, if this is not possible in Cheetah, how can one simulate atmospheric lights
with interior scenes?
Regards
Shaker
Jake, I don't have any problem to get the scene illuminated with the HDRI image, i got a similar image as yours. What i noticed is a lack of reflected lights.
Frank, in Cinema 4D it is possible to apply a HDRI tag to a sky object to illuminate a scene, if this is not possible in Cheetah, how can one simulate atmospheric lights
with interior scenes?
Regards
Shaker
Martin
0
Hi shaker,
you don't have to assign the HDRI to a sphere in Cheetah3D. The HDRI automatically illuminates the scene. The problem is that the light which illuminates the scene comes only from a very small solid angle into the building. Therefore the scene is quite dark by default if you illuminate it just by a HDRI.
You can make the scene brighter if you increase the "intensity" property of the Radiosity Tag.
By,
Martin
you don't have to assign the HDRI to a sphere in Cheetah3D. The HDRI automatically illuminates the scene. The problem is that the light which illuminates the scene comes only from a very small solid angle into the building. Therefore the scene is quite dark by default if you illuminate it just by a HDRI.
You can make the scene brighter if you increase the "intensity" property of the Radiosity Tag.
By,
Martin
Hi all,
I am sorry i didn't specify my question in the other postings. I am evaluating Cheetah 3D and I only want to know if it's possible to illuminate an interior with only a HDRI image?
I know it's possible to "cheat" adding some light sources to get a brighter result, but the testes i made show a problem regarding HDRI images with radiosity. Is it a bug, a limitation of Cheetah, or did i miss some thing?
http://img286.imageshack.us/img286/8194/sponsatest0nn.png
The image shows intense direct lights but no indirect (reflected) ones!
HDRI tag: power= 5.000
Radiosity tag: radiosity, intensity= 5.000
Regardes
Shaker
I am sorry i didn't specify my question in the other postings. I am evaluating Cheetah 3D and I only want to know if it's possible to illuminate an interior with only a HDRI image?
I know it's possible to "cheat" adding some light sources to get a brighter result, but the testes i made show a problem regarding HDRI images with radiosity. Is it a bug, a limitation of Cheetah, or did i miss some thing?
http://img286.imageshack.us/img286/8194/sponsatest0nn.png
The image shows intense direct lights but no indirect (reflected) ones!
HDRI tag: power= 5.000
Radiosity tag: radiosity, intensity= 5.000
Regardes
Shaker
Martin
0
Hi,
Yes, it is possible.
I'm actually wondering what is going wrong in your rendering. As you can see on the other rendeings in that thread diffuse bounces work quite well.
Have you set the "type" property of the radiosity tag to "Radiosity"?
The main problem which might arise is that Cheetah3D doesn't do local tone mapping yet. Once I've added tone mapping, the dark areas should appear brighter.
by,
Martin
shaker said:
Yes, it is possible.
shaker said:
I'm actually wondering what is going wrong in your rendering. As you can see on the other rendeings in that thread diffuse bounces work quite well.
Have you set the "type" property of the radiosity tag to "Radiosity"?
The main problem which might arise is that Cheetah3D doesn't do local tone mapping yet. Once I've added tone mapping, the dark areas should appear brighter.
by,
Martin
Hi Martin,
Thanks for responding.
In the test i set the radiosity type with intensity 5.000 and diffuse scattering 6.
The diffuse bounces work correctly with all other light sources. I made the test with only the HDRI lighting to be sure that the diffuse lights are not coming from other light sources.
Regardes
Shaker
Thanks for responding.
In the test i set the radiosity type with intensity 5.000 and diffuse scattering 6.
The diffuse bounces work correctly with all other light sources. I made the test with only the HDRI lighting to be sure that the diffuse lights are not coming from other light sources.
Regardes
Shaker
Luke,
Good idea to bring this back. This model is becoming better and better with every Cheetah3D new release ! Nice work !
Yeap ! Very nice try ! You love sky lights ? Great ! You are not the only one as I think that people are now starting to realize how much work Martin has been putting behind this to get to this kind of quality. Keep up your nice work.Thought I'd give it a try too - sky light and radiosity. I love sky light
Hey meshman
you are really on roll with this one...brill
Regards
Luke
you are really on roll with this one...brill
Regards
Luke
10 years later with falcon
(at time of posting the render is still running but ok for 2880>1024px.)
(at time of posting the render is still running but ok for 2880>1024px.)
Update
Oops, the colors were too pale.
Here's a better one, a detail from the original resolution render.
(The eventual upscaling of the browser for retina resolution doesn't help.)
I'm doing this to test the new adaptive sampling feature with difficult indirect lighting.
Falcon needs four hours on my Mac to get to 1000 samples, then starts speeding up and finishes at 2202 after 4:40.
Oops, the colors were too pale.
Here's a better one, a detail from the original resolution render.
(The eventual upscaling of the browser for retina resolution doesn't help.)
I'm doing this to test the new adaptive sampling feature with difficult indirect lighting.
Falcon needs four hours on my Mac to get to 1000 samples, then starts speeding up and finishes at 2202 after 4:40.