CoronaOutlineMtl + Camera Clipping Causes Black Areas

Corona Corona for 3ds Max Issues
1

Hi Corona Team,

I’d like to report a possible bug when using CoronaOutlineMtl together with Camera Clipping. In the clipped areas, I’m getting black…

Is this the intended behavior for CoronaOutlineMtl, or is it a bug? If it’s a limitation, are there any workarounds?

Thanks in advance for checking this!

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2

Hi,

Are the black areas the same when regular material is applied?
I guess this is irrelevant to Outline, as it happens occasionally that clipped parts are inner parts of an enclosed geometry where it is actually dark.

3

Hi Aram,

We’re aware that clipped sections of enclosed geometry can appear dark due to lack of light, but the issue we’re reporting is specific to CoronaOutlineMtl.

In our case:

  • The scene uses CoronaOutlineMtl as an Override Material.
  • With camera clipping enabled, the outline effect breaks in clipped regions, resulting in solid black areas. This doesn’t happen with standard materials.

It feels like there’s an unintended interaction between OutlineMtl’s rendering logic and camera clipping. Could the team double-check if this combination is supported?

Thanks again for your help!

4

Confirmed - something is wrong with clipping when using the Outline Mtl. I will log this.

5

This is now reported as (Report ID=CMAX-1793).