Author Topic: Corona Bitmap Color space/RGB primaries not working properly  (Read 1693 times)

2024-02-12, 13:53:04

v.p.vlasenko

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Or maybe I'm doing something wrong?
Screenshot is attached

Changing RGB primaries in corona bitmap has a subtle, almost unnoticeable effect. 3dsmax bitmap working as expected by selecting color space during load (those settings not affecting corona bitmap).

Latest daily build
« Last Edit: 2024-02-12, 14:13:32 by v.p.vlasenko »

2024-02-12, 14:09:42
Reply #1

maru

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I can reproduce this. We will investigate and let you know what is going on...
Marcin Miodek | chaos-corona.com
3D Support Team Lead - Corona | contact us

2024-02-12, 14:14:20
Reply #2

maru

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Looks like passing the normal map through a Corona Color Correct mode with gamma correction 2.2 fixes this, but that should not be necessary...
Marcin Miodek | chaos-corona.com
3D Support Team Lead - Corona | contact us

2024-02-12, 14:24:46
Reply #3

v.p.vlasenko

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yeah, I tried this as a workaround, but that's an additional step, especially when there are a lot of textures.

2024-02-12, 14:49:06
Reply #4

maru

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This is now reported to our devs (Internal ID=1301174543) .
Marcin Miodek | chaos-corona.com
3D Support Team Lead - Corona | contact us

2024-11-24, 23:53:20
Reply #5

v.p.vlasenko

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Hi, I'm not sure but it seems like this was fixed a while ago or not? But now in 12 update 1 I have the same problem.

2025-01-30, 16:24:43
Reply #6

maru

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Hi, I'm not sure but it seems like this was fixed a while ago or not? But now in 12 update 1 I have the same problem.

The original problem was that Max Bitmap and Corona Bitmap would produce different results with the ACES color management mode enabled. I tested this in 3ds Max 2025 with Corona 12 U1 HF1 and all is working fine. The spheres render identically (and correctly) with both Max Bitmap and Corona Bitmap.

If you are experiencing some issue, please explain what exactly is going on.
Marcin Miodek | chaos-corona.com
3D Support Team Lead - Corona | contact us