Rendered Image Effects enable you to add post-production effects without having to render the scene to see the results. Through the Effects panel on the Environment and Effects dialog, you can add various effects and view them prior to final rendering of an image or animation.
Rendered Image Effects let you work interactively. As you adjust an effect's parameters, the Rendered Frame Window is updated with the final output image of both the scene geometry and the applied effects. You can also choose to continually work with an effect and then update the effect manually.
Most rendered image effects in 3ds Max are not compatible with 32-bit floating-point output. If you render using one or more unsupported effects, the following dialog appears:
You can choose to continue rendering without the unsupported effects, or cancel the render.
These render effects support 32-bit floating-point output:
These render effects do not support 32-bit floating-point output: