Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] Bug Reporting => [C4D] Resolved Bugs => Topic started by: Olyandros on 2016-04-19, 21:50:23

Title: Strange normal maps problem
Post by: Olyandros on 2016-04-19, 21:50:23

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 :-)

Thanks!

Title: Re: Strange normal maps problem
Post by: maru on 2016-04-20, 12:22:11

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.

Title: Re: Strange normal maps problem
Post by: Olyandros on 2016-04-20, 15:38:46

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.

Title: Re: Strange normal maps problem
Post by: maru on 2016-04-20, 16:22:31

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

Title: Re: Strange normal maps problem
Post by: Olyandros on 2016-04-20, 18:18:15

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.

Title: Normal Map Intensity
Post by: sht on 2016-06-27, 15:01:58

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!

Title: Re: Strange normal maps problem
Post by: houska on 2017-04-27, 12:59:50

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.