ma0mpt

Equal numbers of photons should be sent from every point on the source, even if some of the objects you're shooting toward are larger than others, and even if they overlap. Ok, so what I have done probably violates that criterion, because if two objects are in-line as seen from the light source they will get two lots of photons shot at them. I think I can fix that though.

Equal numbers of photons should be sent from every point on the source, even if some of the objects you're shooting toward are larger than others, and even if they overlap. Ok, so what I have done probably violates that citerion, because if two objects are in-line as seen from the light source they will get two lots of photons shot at them. I think I can fix that though.

OK so the gurgling baby idea became an infant. I have played around a lot with the DirectionalPhotonSource while trying to find out how it worked. This class uses a large bounding box passed to it with the PhotonMap. I discovered that if you place 4 caustic generating spheres at positions in the scene so as to create a huge bounding box then the stratified sampling algorithm bogs down while shooting photons. It becomes unusable. The sample scene has 4 such spheres in it. If you try rendering with...

OK so the gurgling baby idea became an infant. I have played around a lot with the DirectionalPhotonSource while trying to find out how it worked. This class uses a large bounding box passed to it with the PhotonMap. I discovered that if you place 4 caustic generating spheres at positions in the scene so as to create a huge bounding box then the stratified sampling algorithm bogs down while shooting photons. It becomes unusable. The sample scene has 4 such spheres in it. If you try rendering with...

OK so the gurgling baby idea became an infant. I have played around a lot with the DirectionalPhotonSource while trying to find out how it worked. This class uses a large bounding box passed to it with the PhotonMap. I discovered that if you place 4 caustic generating spheres at positions in the scene so as to create a huge bounding box then the stratified sampling algorithm bogs down while shooting photons. It becomes unusable. The sample scene has 4 such spheres in it. If you try rendering with...

In the case of the directional light source, generating photons for the photon map, I am mulling over an idea that I think has potential to be more efficient than blasting rays from every part of the the bounding box face. Just a baby idea gurgling at me from its cot at the moment...

Thanks to your help Pete I am starting to understand how the directional light source photon mapping stuff works with caustics. Although I am having problems visualizing (in my head) how the stratified sampling works. But I have a feeling that it shoots rays into the bounding box from distributed random positions on one end of the box, in the direction of the light. Which kind of sound sensible. And where it hits a refractive/specular object it creates photons. Directional Lights, Point Lights, Spot...

Thanks to your help Pete I am starting to understand how the directional light source photon mapping stuff works with caustics. Although I am having problems visualizing (in my head) how the stratified sampling works. But I have a feeling that it shoots rays into the bounding box from distributed random positions on one end of the box, in the direction of the light. Which kind of sound sensible. And where it hits a refractive/specular object it creates photons. Directional Lights, Point Lights, Spot...