Multi-Pass Rendering

[goro]

It is written in Vizard's Core Features under Technical Features that Vizard supprots multi-pass & multi-stage rendering. I am working on Augmented Reality & multi passing is essential for us to get realistic output.

By using <viz>.addRenderTexture() command I am able to get the screen output. By using shaders I can even process that texture. But my requirement is to process the processed textures.

Input_Texture --- > Pass 1 ------> Output 1
Input_Texture --- > Pass 2 ------> Output 2
.
.
.
Input_Texture --- > Pass n ------> Output n

{Output 1, Output 2, .... , Output n} --- > Final Pass ----> Final Output

Please help me with the solution. If I am conceptually wrong then please correct me.
Thanks!