renderman

Given that, you might try increasing the amount of time that alfserver waits before escalating to SIGKILL. One second is a long time for a process to be unresponsive. Try small increments, for example, in alfserver.ini change this line:

SetPref timerAlfserverSignalEscalation 3

Also, the log indicates that you are running the server as root, which would be ok if you were causing the actually-launched apps to run as a different user. I think you've got "AlfProcessOwnerConfig login root" set in your alfserver.ini ? There is a chance that the "login" mode is adding an extra layer of complexity to this issue.

Usually we suggest you run your alfserver in one of two modes:

mode A:
- run alfserver as root
- use "AlfProcessOwnerConfig setuid $dispatcherUser"
- set up env configuration in alfserver.ini

mode B:
- run alfserver as some other user (like create an "alfserver" account), with a well-defined operating environment
- use "AlfProcessOwnerConfig server" in alfserver.ini

The above is a quote from Pixar's replying to alfserver's configuration.

如果因為一些原因，你需要自行在 RIB 裏頭產生一段 camera 相關的參數來（像是使用 prman 的 multi-camera 這個 13.5 才有的新功能），那這篇文章就是在提示你，怎麼搞懂 RIB 裏頭，camera 會用到的 transformation, perspective 參數乃至於 screenwindow。

Transformation

取出 camera 的 worldInverseMatrix 這個屬性出來（用 mel 或 python 都可），它是一個 matrix。然後因為 RenderMan 是使用左手座標系統，而 Maya 是使用右手座標系統，所以你還得把這個 matrix 的第三行（直行橫列）的值變為相反數，亦即把第三行的值（m[2] m[6] m[10] and m[14]）乘上 -1。

Perspective

RenderMan's "perspective" camera FOV = rad_to_deg(2*atan((xres/yres)*12.7/cam.focalLength))

ScreenWindow

這部分，可以參考我的好同事 Mao 所寫的一篇 blog。

感謝 Dan Maas 的解說 :)