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Hey everyone. I've been thinking about this effect for a while now. As most of the renders nowdays try to achieve photorealism and so on. And now that vray is getting closer and closer to release of 1.5 which should make it one of the most solid renders to date, I hope that after 1.5 release chaos will be doing addons to it like shaders and etc. So here is my personal request to add this in:
Look below at the example of the effect Im looking for.
So let me clarify, the areas specified in the circle is the flere i was talking about. I think and believe that effect like this adds nice touch of realizm to the picture. This example below shows how 3d doesnt:
On the left is the correct highlite bleeding preception that happenes in the camera and the human eye, on the right is the usual spec highlite thats rendered by all software.
Now how to reproduce this effect?
well here is little something:
"A camera lens has a number of elements that work together to focus an image onto film. The insides of lenses are coated with an anti-reflective material to help reduce the amount of secondary reflections known as ghost. In the case where bright lights are facing the lens, the lens coating is not fully effective and secondary reflections occur producing what are known as lens flares. Each part of the camera that light travels through before reaching the film may cause a secondary reflection which can show up as spots or banding. For this reason Zoom lenses with many focusing elements may have a complex looking flare, while prime lenses with only a few elements will result in simplistic looking flares. Lens flares in amateur photography are often thought of as mistakes, however many film directors integrate them purposefully for dramatic effect. Some factors that play a role in the look of a lens flare are discussed in the following pages.
Number of lens aperture blades.
The aperture controls how much light will enter the lens by adjustment of the "f-stop." Constricting or expanding a set of blades that form a circular shape adjust the f-stop.The area where two blades meet is more reflective and will cause a streak reflection across the film. A lens with 6 aperture blades as pictured below will produce 6 streaks. The streaks are focused on a point. This point becomes the center of the lens flare, and a ball with 12 spikes is formed. The aperture blades also control the shape of what I call reflection particles. The reflection particles are the result of light reflecting off of various parts of the lens inside of the camera. Because the light is first formed into a polygonal shape by the aperture blades the reflections will also be in the shape of the aperture blades. The reflection particles usually occur in a line that passes through the center of the lens and center of the light source."
Here is more detailed about the camera/eye and the physical lense and flare
http://www.pasadenaeye.com/faq/faq15/faq15_text.html
http://jonathanclark.com/diary/flare/
My idea on how to do this:
I think it can be a combination of the shader and camera. The reason for this is that we not always want a huge flare or maybe we dont want it on a specific object. 3d offers a lot of control and control we need. So thats why combination of shader and camera are needed. In the shader such as vrayMtl can have a rollout which would be SBLFD - or whatever.
In there there might be controls for the amount of flear bleed, streaks and so on. Then in the vray camera options this function can be set to enable or disable and it would correspond to the number of blades vray camera has and so on. Also the shader will play an essential role because it will give ability to do perpass render by turning everything else off.
Also, I've noticed that some of the flare produces dispersion in the streaks so that can also be an option.
So I think I've said it.
Have fun and let me know what you think.
Cheerz
Look below at the example of the effect Im looking for.
So let me clarify, the areas specified in the circle is the flere i was talking about. I think and believe that effect like this adds nice touch of realizm to the picture. This example below shows how 3d doesnt:
On the left is the correct highlite bleeding preception that happenes in the camera and the human eye, on the right is the usual spec highlite thats rendered by all software.
Now how to reproduce this effect?
well here is little something:
"A camera lens has a number of elements that work together to focus an image onto film. The insides of lenses are coated with an anti-reflective material to help reduce the amount of secondary reflections known as ghost. In the case where bright lights are facing the lens, the lens coating is not fully effective and secondary reflections occur producing what are known as lens flares. Each part of the camera that light travels through before reaching the film may cause a secondary reflection which can show up as spots or banding. For this reason Zoom lenses with many focusing elements may have a complex looking flare, while prime lenses with only a few elements will result in simplistic looking flares. Lens flares in amateur photography are often thought of as mistakes, however many film directors integrate them purposefully for dramatic effect. Some factors that play a role in the look of a lens flare are discussed in the following pages.
Number of lens aperture blades.
The aperture controls how much light will enter the lens by adjustment of the "f-stop." Constricting or expanding a set of blades that form a circular shape adjust the f-stop.The area where two blades meet is more reflective and will cause a streak reflection across the film. A lens with 6 aperture blades as pictured below will produce 6 streaks. The streaks are focused on a point. This point becomes the center of the lens flare, and a ball with 12 spikes is formed. The aperture blades also control the shape of what I call reflection particles. The reflection particles are the result of light reflecting off of various parts of the lens inside of the camera. Because the light is first formed into a polygonal shape by the aperture blades the reflections will also be in the shape of the aperture blades. The reflection particles usually occur in a line that passes through the center of the lens and center of the light source."
Here is more detailed about the camera/eye and the physical lense and flare
http://www.pasadenaeye.com/faq/faq15/faq15_text.html
http://jonathanclark.com/diary/flare/
My idea on how to do this:
I think it can be a combination of the shader and camera. The reason for this is that we not always want a huge flare or maybe we dont want it on a specific object. 3d offers a lot of control and control we need. So thats why combination of shader and camera are needed. In the shader such as vrayMtl can have a rollout which would be SBLFD - or whatever.
In there there might be controls for the amount of flear bleed, streaks and so on. Then in the vray camera options this function can be set to enable or disable and it would correspond to the number of blades vray camera has and so on. Also the shader will play an essential role because it will give ability to do perpass render by turning everything else off.
Also, I've noticed that some of the flare produces dispersion in the streaks so that can also be an option.
So I think I've said it.
Have fun and let me know what you think.
Cheerz
Glad it's not just me 
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