Strange normal maps problem

Corona for Cinema 4D Corona for C4D :: Issues
1

Hi,
i have some strange normal mapping problems since v4.1 and it is still present in 5.1.

  • normal maps are not displayed in material preview using the corona bitmap shader
  • normal maps don’t react to strength value in the bumpmapping channel
  • phong-tag seems to have no effect when normal maps are beeing used (see shading on the sphere)
  • lack of detail in the normal maps when using the corona bitmap shader

Could it be that I am missing some MS Visual C++ Redistributable Packages that could cause the problem?

System is Windows 10 Pro 64bit and the problems appear in R16 as in R17. Also take a look at the attached images :slight_smile:

Thanks!

corona1.jpg
corona1.jpg1485×740 302 KB

corona2.jpg
corona2.jpg1480×770 357 KB

2

Hi, are you using greyscale bitmaps (“bumpmaps”), or rgb normal maps?
For normal maps the workflow should be:
bumpmapping > corona normal shader > bitmap
They should be displayed in material editor and in render.
I can confirm that the strength spinner does not seem to work in bumpmapping tab when using normal maps.
In 3ds Max there is a strength spinner in Corona normal shader, so adding it should probably fix the issue…

I had no problems with greyscale maps. They seem to work straightforwardly.

3

Hi, I used the workflow as you described: bumpmapping > corona normal shader > bitmap
I am using a regular rgb normal map, used it in V-Ray before and it worked fine.

corona3.jpg
corona3.jpg988×491 68.5 KB

4

Can you go to plugins>Corona>about Corona and tell me if you see the same version number as in the image?

version.jpg
version.jpg449×292 51.3 KB

5

I checked the version and it is the same, except I am running 17.048.

But I found out if i change the texture path from a relative to an absolute one it seems to work. I get a correct material preview but still a black picture in the normal shader itself.

corona4.jpg
corona4.jpg729×511 62.6 KB

corona5.jpg
corona5.jpg729×510 90 KB

6

Hi,

Any news on that topic?

“Hi, are you using greyscale bitmaps (“bumpmaps”), or rgb normal maps?
For normal maps the workflow should be:
bumpmapping > corona normal shader > bitmap
They should be displayed in material editor and in render.
I can confirm that the strength spinner does not seem to work in bumpmapping tab when using normal maps.
In 3ds Max there is a strength spinner in Corona normal shader, so adding it should probably fix the issue…”

~~Full thread here: https://forum.corona-renderer.com/index.php/topic,11598.msg74959.html#msg74959~~ Edit: This post was merged into the aforementioned thread

Thanks!

7

As far as I know, the strength and many related normal problems should be fixed. If you still encounter any of the bugs in this post, feel free to reopen it! Thank you for your report.