Author Topic: Big Bug !!!! About 'Opacity' with a texture with alpha never right working !!!  (Read 4217 times)

2014-10-28, 14:10:43

M.S.Referee

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In fact, this bug is still there whatever old version of Corona or Corona v7.


To explain the BIG bug:

When you use a texture with alpha channel and assign to geometry, for example to leaves, and whatever you choose "CoronaMtl" or "Standard" material shader, you connected the texture with alpha to them "Opactiy", you will see the both still there alpha masked area and out alpha color and when you render, you will see the WHOLE Geomery just with a texture, no alpha masked effects or got reverse effects that the main content be masked and leave those should be masked content visible.

For example setting:

1.To create a "CoronaMtl"
2.To create two "Bitmap" nodes
3.To connect a "Bitmap" node without alpha to "CoronaMtl"  Diffuse-->Color
4.To connect other "Bitmap" node with alpha to "CoronaMtl" Opactiy-->Color
5.Assign "CoronaMtl" to your geomery
6.Render it, and you will see that bug

3dsMax version: 2014

That's so affliction, this bug directly affect the forest, grass, flowers and them use a texture with alpha to create those leaves actually.

So, please please please please please please please please!!!!!!!!!!!!!!!!!!!!!!!
Please fix this bug!!!!!!!!!!!!

If you choose to use Corona Render, no one think it no good and no fast, but do not got this bug which can killed all user down with it.

Thanks very much!!!!
« Last Edit: 2014-10-28, 14:44:45 by M.S.Referee »

2014-11-01, 06:53:07
Reply #1

Christa Noel

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M.S.Referee, could you please add some pics/ scene preview?

2014-11-01, 12:18:57
Reply #2

higgledyhiggles

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I think many have found the same issue in every version of Corona.
You have to put the opacity map inside a corona wrapper. It`s been mentioned before although I`m not sure if it`s considered a bug or not. It is however, a bit of a pain.
Apologies if it`s since been amended.

2014-11-04, 16:44:28
Reply #3

M.S.Referee

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M.S.Referee, could you please add some pics/ scene preview?

Hi, I don't know how to post a image, but you can see this post:
https://forum.corona-renderer.com/index.php/topic,2570.0.html

This post reported the same bug, and I saw the post after I posted this....

2014-11-04, 16:49:33
Reply #4

M.S.Referee

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I think many have found the same issue in every version of Corona.
You have to put the opacity map inside a corona wrapper. It`s been mentioned before although I`m not sure if it`s considered a bug or not. It is however, a bit of a pain.
Apologies if it`s since been amended.

Hi, I tied to do with lots of way, but I found there is only way to get right render, you have to save out only alpha channel to jpg and put the alpha jpg to opacity, you will got right render. And about others pictures with alpha inside, all no way.