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OpenGl Terrain blend seams #1318

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aurodev opened this Issue May 29, 2015 · 4 comments

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commented May 29, 2015

Terrain texture seams at blend edges with 2+ texture layers, only in OpenGl.

Occurs when using any detail texture and seems independent of square size, resolutions, base texture size etc.

Only tested on AMD Radeon HD7700 + updated drivers.
Win 8.1
Tested with Torque v3.6.3 and 3.7 Release

Solution / workaround
In game\shaders\common\terrain\terrain.glsl
uv += 0.00195;
vec2 xy = floor( uv );

Forum post:http://forums.torque3d.org/viewtopic.php?f=9&t=231

seam4
seam2

seam3

@crabmusket crabmusket added this to the 3.8 milestone May 29, 2015

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commented May 30, 2015

Someone noted that the terrain textures look like they have no detail textures
http://forums.torque3d.org/viewtopic.php?f=9&t=231&p=1893#p1893

Adding additional pics for clarity
OpenGl
newseamsfourmpost2

newseamforumpost3

newseamsfourmpost4

newseamsforumpost5

@lukaspj

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commented Aug 23, 2015

Seems like an off-by-one error in texcoords

@Areloch

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commented Oct 5, 2015

Have not been able to replicate this out of apparent rather specific hardware circumstances. I'm pushing this issue back to 3.9 so we can keep an eye on it, but unless we can get a more generally easier to replicate setup to better track it, options to fix and test are limited.

@Areloch Areloch modified the milestones: 3.9, 3.8 Oct 5, 2015

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commented Oct 10, 2015

/Agree

@aurodev aurodev closed this Oct 10, 2015

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