NotMyFault Posted January 27 Share Posted January 27 found a strange issue. Using a PT filter to add a small amount to selected color channels, the PT filter stops working after 32 copies. Basic principle: base fill layer gives R and G as zero, and B as 1 (of 255) PT filter adds value of B to R and G channel. B values stays constant. Use info panel to inspect color values (and your eyes to see canvas). The filter adds up nicely until color value 32. Then it stops to add. You may modify the base layer color values, e.g change R value from zero to 27 and result still stays at 32. So it is not depending on number of PT filters, it is depending on color values. Only when setting R to 32 you start to get higher values (after pT filter) I use other file with hundreds of PT filters working fine. Mac mini M1 (2020) Affinity 2.3.1 retail and beta 2.4.0 PT filter cannot count above 32 bug.afphoto Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. Link to comment Share on other sites More sharing options...
NotMyFault Posted January 27 Author Share Posted January 27 I tested the same process using a channel mixer adjustment: R=R+B G=G+B B=B and duplicated the channel mixer many times. this works with any amount of layers. Why does the PT filter gives different results than the channel mixer adjustment when using essentially the same formula? Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. Link to comment Share on other sites More sharing options...
NotMyFault Posted January 27 Author Share Posted January 27 The same file works flawlessly on iPad. So I assume a bug with Mac version. Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. Link to comment Share on other sites More sharing options...
NotMyFault Posted January 27 Author Share Posted January 27 The Problem seems to be bound to Display being in HDR/EDR mode in system settings. After deactivating HDR mode, issue vanished. Never the less, this should be fixed as Affinity Apps are advertised as HDR/ERD capable. Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. Link to comment Share on other sites More sharing options...
NotMyFault Posted January 27 Author Share Posted January 27 ah partially my fault. for unknown reasons, the PT filter has inherent mask with partial alpha. Probably happened by mistake when I adjusted a color layer. Never the less, why system HDR settings make a difference is mysterious to me Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. Link to comment Share on other sites More sharing options...
Alfred Posted January 27 Share Posted January 27 4 minutes ago, NotMyFault said: partially my fault How can you say such a thing? Whatever happened to “not my fault”?? NotMyFault 1 Quote Alfred Affinity Designer/Photo/Publisher 2 for Windows • Windows 10 Home/Pro Affinity Designer/Photo/Publisher 2 for iPad • iPadOS 17.4.1 (iPad 7th gen) Link to comment Share on other sites More sharing options...
NotMyFault Posted January 27 Author Share Posted January 27 Heros go down (c) Susan Vega Alfred 1 Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. Link to comment Share on other sites More sharing options...
Staff Leigh Posted March 5 Staff Share Posted March 5 @NotMyFault Just wanted to let you know that we've not forgotten about this post - we're trying to get some clarification on this issue for you. When we have an update, we'll let you know. NotMyFault 1 Quote Link to comment Share on other sites More sharing options...
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