reduce alpha value for discard with blend True. Now set <= 0b00000001

pi3d/Buffer.py

@@ -308,13 +308,13 @@ def draw(self, shape=None, M=None, unif=None, shader=None,
 
       if texture.blend:
         # i.e. if any of the textures set to blend then all will for this shader.
-        self.unib[2] = 0.05
+        self.unib[2] = 0.0035 # i.e. alpha byte in image 0b00000001 is 0.00392
 
     if self.unib[2] != 0.6 or shape.unif[16] < 1.0 or shape.unif[17] < 1.0:
       #use unib[2] as flag to indicate if any Textures to be blended
       #needs to be done outside for..textures so materials can be transparent
         opengles.glEnable(GL_BLEND)
-        self.unib[2] = 0.05
+        self.unib[2] = 0.0035
 
     self.disp.last_shader = shader
 

pi3d/shaders/2d_flat.fs

@@ -12,7 +12,7 @@ void main(void) {
   coord -= unif[14].xy; // offset
   coord *=  pix_inv; // really dividing to scale 0-1 i.e. (x/w, y/h)
   vec4 texc = texture2D(tex0, coord);
-  if (texc.a < unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
+  if (texc.a <= unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
   gl_FragColor = texc;
   gl_FragColor.a *= unif[5][2];
 }

pi3d/shaders/shadowcast.fs

@@ -14,7 +14,7 @@ vec4 pack (float depth)
 
 void main(void) {
   vec4 texc = texture2D(tex0, texcoordout); // ------ material or basic colour from texture
-  if (texc.a < unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
+  if (texc.a <= unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
   float normPosn = position.z / position.w;
   normPosn = (normPosn + 1.0) / 2.0;
   gl_FragColor = pack(normPosn);

pi3d/shaders/std_main_mat.inc

@@ -3,5 +3,5 @@
 // NB previous define: unib, unif, dist
 
   vec4 texc = vec4(unib[1], 1.0); // ------ basic colour from material vector
-  if (texc.a < unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
+  if (texc.a <= unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
   float ffact = smoothstep(unif[5][0]/3.0, unif[5][0], dist); // ------ smoothly increase fog between 1/3 and full fogdist

pi3d/shaders/std_main_uv.inc

@@ -3,7 +3,7 @@
 // NB previous define: tex0, texcoordout, unib, unif, dist
 
   vec4 texc = texture2D(tex0, texcoordout); // ------ material or basic colour from texture
-  if (texc.a < unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
+  if (texc.a <= unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
   if (unif[5][0] < 0.0) {
     if (dist > abs(unif[5][0]) || dist <= fract(fog_start) * 100.0) discard; // don't draw
   }

pi3d/shaders/uv_pointsprite.fs

@@ -21,7 +21,7 @@ void main(void) {
   if (any(greaterThan(abs(rot_coord), limit))) discard;
   rot_coord += p_centre;
   vec4 texc = texture2D(tex0, (rot_coord * subsize + corner));
-  if (texc.a < unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
+  if (texc.a <= unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
   gl_FragColor = colour * texc;
   //gl_FragColor.a *= texc.a;
 }

pi3d/shaders/uv_toon.fs

@@ -19,7 +19,7 @@ void main(void) {
     float bfact = 1.0 - smoothstep(30.0, 100.0, dist); // ------ attenuate smoothly between 30 and 100 units
 
     float intensity = clamp(dot(lightVector, normalize(vec3(0.0, 0.0, 1.0) + bump * bfact)) * lightFactor, 0.0, 1.0); // ------ adjustment of colour according to combined normal
-    if (texc.a < unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
+    if (texc.a <= unib[0][2]) discard; // ------ to allow rendering behind the transparent parts of this object
     texc.rgb = (texc.rgb * unif[9]) * intensity + (texc.rgb * unif[10]); // ------ directional lightcol * intensity + ambient lightcol
 
     float d = 5.0;